Three things I can say at least:
1. It's very easy to operate, easier than you'd think for such a small camera. If you've used Pentax camera before, you probably don't even need to ready the manual
2. AF is really fast for a small camera like this, I feel it's faster than GF1+20/1.7 combo (which is considered to be pretty fast for an EVIL camera)
3. Photos are really really sharp even wide open
I'll try to post some photos and hands on experiences later on ...