So I finally got a chance to play with a Q704 today. My colleague got a new Q704, and I clean installed Windows 8.1 and set it up for him. I spent most of the day with it, but had little opportunity to actually test it. Hopefully when he returns from Germany I can borrow it again to run it through its paces a little more. My initial impressions of the device where very good. While sitting idle with Windows 7 installed the fan was inaudible and it wasn't hot to the touch, however it wasnt on for very long before I started the Windows 8 install process. The build quality seemed excellent. I immediately started to question my decision to go with the T904 over this (however, I still think I made the right decision for me). It was equipped with the full sized keyboard which includes the battery and ports. It had 2x USB 3.0, Ethernet, HDMI and VGA ports on the keyboard and a 45 Whr battery. The keyboard was much better quality than I expected for a detachable keyboard. The touch pad was pretty decent as well except I couldn't find a way to make it resistant to stray touches that occur while typing. There doesn't appear to be a Synaptics driver for it. I'm not sure it is a Synaptics touchpad. The Synaptics touch pad on my T904 has a feature to disregard stray clicks on the touch pad which works very well. This keyboard added a significant amount of weight and thickness to the device. Im not sure which was heavier the keyboard or the slate. With the keyboard attached it was very noticeably heavier than the T904 and significantly thicker as well. When I started the install process, the fan noise immediately kicked up and it became quite warm to the touch in the vicinity of the heat sink. I didnt find it to be incredibly loud, but it was very clearly audible. The tone however was not high pitch as it is on the T904 when that fan kicks in, so, at least, it is far less annoying than it could have been. The fan was on pretty much the entire time I had it from that point on, however, I was also nearly constantly installing software and updates. In the times I wasnt installing/updating the search indexer was constantly going. My colleagues OneDrive files total ~150GB with a file count of about 200k. It seems to have been hung up on indexing this and the CPU usage hovered between 10-20% pretty much all the time while idle and the clock was rarely in its lowest power P-state (~0.7 GHz). For comparison, idle usage on my Surface Pro (1) and T904 is typically 0-2% with the clock pretty much locked in the lowest P-state. While idle the fan was on constantly and the slate was quite warm (borderline hot) to the touch. On the plus side, while in laptop mode, none of this heat was in your lap. That is one benefit of the detachable slate that never occurred to me. Since the heat is behind the glass instead of under the keyboard, you dont feel it in laptop mode. Heat is one of my pet-peeves about laptops/tablets. In slate mode however, I found it quite uncomfortable to hold, but, keep in mind, this is one of my pet-peeves, and it was constantly under load because of the indexing. I dont think the load is high enough to explain the level of heat (compared to other Haswell devices). I got the distinct impression that this device is significantly less efficient at dissipating heat. With the T904 it seems that the fan may be a little over aggressive, so the fan may be louder than it needs to be at a given level of load. The T904 remains very cool to the touch except under significant load. The Q704 on the other hand seems to get hot very quickly. I think the fans are running hard for a good reason. With the T904 it seems as though there is little reason to go for the higher end CPU configurations because the thermal limits dont seem to allow you to really take advantage of the extra potential of the higher end processors. It seems this is the case with the Q704 as well, but with an even lower (I think significantly) thermal threshold. If you are looking to get full sustained iCore performance out of this device, I do not think this is the device for you. I seriously doubt a firmware update is going to bump performance significantly in the future. I think the limitation is thermal, and that isnt likely to change. I should point out though that this device seemed in no way sluggish. I noticed no difference in performance from my T904 or Surface Pro. If youre intended use case is light like note taking, browsing, document editing and similarly demanding tasks. You can expect snappy performance. If you are running demanding programs like demanding 3D modeling or art programs and long running computational codes you will definitely notice the difference between this device and un-hamstrung ULV Haswell processors. Fortunately for me, I dont require the demanding tasks (my computational work is offloaded to servers), so the thermal limit is not a big deal in my use. In any case though, it seems getting anything but the minimum processor configuration is a waste of money. In my last ~20 minutes with it, I disabled the indexer to get an idea of how it behaved under normal circumstances. With the indexer disabled the idle utilization was very similar to my other devices, and after some time the fan dropped to nearly inaudible levels. It remained warm, but it is unclear if it had enough time to cool after being thoroughly saturated in heat for several hours. My only use test was OneNote. The performance was very good, however, I noticed if I wrote very quickly several lines the fan would pick up slightly. It was unclear to me if this would have happened though if it hadnt been running so hot before this. The power draw while note taking (I only saw a couple ticks) seemed very good (4-5W with ~50% screen brightness). At that rate it should last ~10 hours on the internal battery, or as much as 20 with the keyboard! I hope to be able to do more testing when my friend returns from Germany and lets me play with it some more =) The screen seemed very good. Im not a good judge of things like color accuracy, but the screen was much brighter than my T904 and the view angles where much better. The screen seemed to me to be on par with my Surface Pro. My T904 has a matte screen protector on it though which I think is making the view angles significantly worse (Im considering removing it). One thing I noticed however was that the image was distorted by the pressure of the pen. While writing in OneNote there were ripples that followed the stroke of the pen. I think this is likely something that I would get used to and ultimately wouldnt bother me with time. Im fairly sure Ive seen this behavior on previous tablet PCs, but I havent experienced it on recent ones, so Ive become unaccustomed to it. That is all for now. Hopefully, I will get some more time to do some more tests with it soon. Here is a picture of my Surface Pro and T904 next to the Q704 (right).