its fine for general purpose use, but barely. its livable with photoshop, which i use extensively. certain things itll hiccup, such as streaming 1080p or even 720p youtube on chrome which is choppy (html5, flash, doesnt matter).
using native browser like safari is a little better.
general ms office usage is fine. its just certain operations you'll take notice of having to 'wait'.
the lack of headroom in terms of performance means very little longevity for me. coupled with annoyances of the keyboard (durability), lack of ports, etc, and doesnt get a recommend from me.
owned 2 pros and 3 airs. would heartily recommend any of them with 95%+ satisfaction. this one gets a 80% from me. for you, i suggest waiting for release of the new 13" MBP