I think it's pretty good, actually friggin' fantastic, but thats because i'm looking to get rid of my aging 2008 MBP. The question I (and i think many others) have is, will the upcoming Skylake laptops be 'that much' better? i'm willing to continue waiting but only if Skylake is expected to live up to it's hype.
A 2008? Congratulations!!
The longest I've kept a machine is a little over 5 years. I probably would be on a 2014 rMBP if I didn't face encryption issues when I got one at the end of last year.
I'm hoping this refresh will address the encryption issue (hang on setup and never complete even after being plugged in) because I intend to order one soon. I think between the memory speed upgrade and the haptic touchpad, this machine is great in terms of feature set.
I've decided the rMBA is not for me. With the single port it is very limiting. Need an adapter just to be able to use a CD. I predict a boom in Apple's dongle business. Actually, it'll be a boon for best buy's and other such stores as travelers realize they lost/forgot their adapter and need a new one.