I purchased an Acer c720 last week after trading in a few laptops to Best Buy during their deal. I like it quite a bit. I setup a USB 3 stick to boot linux so I can use VLC as desired; otherwise I'll just roll ChromeOS. The only thing I don't care for is the keyboard. It's actually not that bad, but since my daily driver is a thinkpad T61, it's kinda hard to go to this one (...)
I'm still working on key mappings, but unfortunately, it is that bad, and not just because I
also came from an old Thinkpad (R60). Mine's already lost the down arrow key cap, and right arrow key cap is staying loose. The metal part of the keyboard's frame seems to be shaving off the nubs that hold the scissor parts, if the key isn't pressed straight down. Not the greatest design and/or QC (I know, it's got a $200 MSRP, but it's only a couple months old!). Spending a lot of time in text editors and terminals, and with shift+down/up replacing pgdn/pgup, I probably have more cycles on down, left, and right, each, than all the other keys combined

. Just in terms of feel, it is not bad, though, and definitely better than previous generation Acer netbooks and cheap notebooks I've used.
I'm using Ubuntu 14.04 (
using this script), with Bodhi repos, to use a well-themed E17. Aside from the keyboard, it's working great, and I do consider the light weight, and Haswell-enabled battery life, worth most of the negatives (like low RAM, and small M.2 SSD). I get 3-4 hours to 50% under load (watching videos, playing Dwarf Fortress, compiling junk), and it uses under 1%/hr in S3. All the while, it's nice and snappy, unlike the ARM-based models (I don't care what GHz they can advertise, that Samsung is only barely competitive with a Jaguar (IE, x131e), and simply laughable compared to SB (C710) or Haswell (C720)), has plenty good enough IGP, and performs about like a ~2GHz C2D when CPU-bound.
I figured my first peripheral for it would be a USB hub/NIC, or trackball...but, it's a keypad, of all things, so I can (a) not destroy the remaining key caps, and (b) have some keys to map to useful missing keys (like ins, home, F11, and del).