In general, very happy with it. Good processor, good speed. I'm a software developer, so I'm somewhat a power user (with Visual Studios, a DB, and a graphics editor running regularly.) I use a portable mouse, so no concerns with the trackpad (although I use it, with few concerns.)
Two issues, though. The laptop doesn't sit flat. The right front (for my unit) sits high, and on a flat table, can be an issue. It's generally OK, but enough that I wouldn't give it full stars.
The other issue I've had is with the resolution of the screen, which is not a bad thing. I adjust the viewer - the screen resolution is frighteningly good, and sometimes my 40yr old eyes are not up to par. Not an issue for most, so I wouldn't adjust the rating for it.
TL;DR; Doesn't sit flat, otherwise, a great ultrabook for the price.