I'm not sure I would recommend a rMB to anyone. It feels slower and more unstable IMO. I haven't noticed any battery life issues yet. However, if I had to do this all over again I would've went with a 15" rMBP instead. I love the HUGE display and has more power. I can see that power is a MUST for my needs.
I think this is comparable to the 2008 MBA.
I think this is comparable to the 2008 MBA.