I had the 5y10c model for a few weeks. I sent it back on Wednesday. The finish is VERY slippery -> needs a skin or a case. Dell stylus works. This/these is/are my first device with an active digitizer, I'm not an artist so I can't say much beyond it works. i.e. I cannot compare to n-trig, wacom, drawing usability, etc. It throttles to ~ 4.6W on battery(found this the other day trying prime95), ~12W on AC -> locks @ 1.2GHz on battery under prime95 locks @ 2GHz on AC prime95 (7140 was @ ~6W on batt and cpu 14-6GHz) Prime95 chewed through 12% of batt(30% -> 18% then I put on AC after noticing throttling(hwinfo sensor) and deciding to check and also worried about killing batt) in a span of a few minutes. Geekbench scores on BOTH battery AND AC(re-tested after I found the batt throttling) scores lower than the $450 Best Buy Dell 7140(bought one last Saturday 5/16/15) Octane v2 on Chrome BOTH the T300 & 7140 scored ~17k (I don't have a high opinion of octane as a bench though given my i7-3930k/i7-4770k/i7-4800MQ ALL score ~33k.) I found it too large and unwieldly to use as a tablet even after buying a cheap case thinking that that might help it -> kind of like using a legal pad Battery life I got on it light web browsing was c. 4h 40m to maybe 5h, the highend model WILL be lower, think 4h max. Keyboard dock is AWFUL(keyboard) and so is the trackpad. [EDIT] Wifi range is utter crap. Barely any 5GHz signal a mere 30' from my router, funnily enough an ASUS RT-AC66. 2.4GHz band APPEARS to be better but bandwidth is VERY low in same spot, ~30-45Mbps. 7140 gets 100s of Mbps in same location. (Possibly a drawback of the Al chassis or just poor antenna locating.) [/EDIT] Keyboard dock is perfectly stable on a nice relatively level surface, but in their insane desire for thinness they put the dock ballast too far towards the back, so in your lap at an angle it's unstable as all hell. The aluminum chassis helps the T300 keep thermals under better control than the large copper heatsink/mostly plastic shell of the 7140. I only hit 80C running prime95, while the 7140 was bumping up against 90C. Light web browsing max I saw for the T300 was 52C and normally it was 47-8C while the 7140 is generally mid 50sC. Took over 3h for the T300 to install ~100 windows update on first power up after charging. Ate through 50+% of batt in less than 1.5h after which I moved it back to AC to finish. (7140 took ~45m t install ~60 updates on first powerup.) T300 chi (5y10c) is a 1x4GB setup -> memory is SINGLE channel -> lower iGPU perf(mostly, there will be some impact on general use as well). I'm hazarding this is because the 5y71 is 2x4GB to get the 8GB and ASUS was too cheap to do 2x2GB on the 5y10c. 4GB is a ridiculously egregiously low amount of RAM for devices that are using soldered RAM, more I find it reprehensible especially for the price that ASUS is asking(and MANY other manufacturers selling products with fixed RAM). (The 7140 has the same low 4GB but is dual channel configuration.) Overall I liked(and kept) the 7140 for it's size, batt runtime, and user maintenance acces plus fullsize USB port as well as all of the others. Additionally I think that the BB 7140 is the true fair price(w/10% mover's coupon or other discount) for core m devices given their performance, a bit better than highend atom). The only real difference between these core 5yZX models will be the turbo clock and how long the various designs can hold that clock speed o.w. IMNHO they will ALL perform at a similar level all things being equal(BIOS throttling settings, etc.) IOW I found the T300 disappointing and disappointingly overpriced. I found the 7140 to be more acceptable(performance was still lower than my already low expectations and this is from buying a cheap china z3735f that outperformed my low expectations which led to me wanting to look for a bt better -> core m) with the pluses of better batt runtime, user maintenance access(SSD, WiFi card, WLAN card, etc.), better accessory availability(mobile keyboard w/extra batt, more case choices, etc.) and generally a better overall size for tablet usage(still a little on the large size but WAY better than the T300). Theb7140 isn't perfect, but it ended up being more of what I was looking for, so the T300 got shipped back to M$ Wednesday.