I'm used to shooting with my Nikon D40. Got this a couple of weeks ago and getting familiarised with it. Took it out for a full day with the 14mm prime and my Nikon. I didn't actually need to take my Nikon out of the bag as the GF2 served most of what I needed to (except when its battery died at the end of the day).
The touch screen will split opinions, some will like it, some won't. I personally am warming up to it, though I still find buttons on a DSLR much more convenient. The ability to pick the Auto focusing points on the screen does come useful.
What is wonderful about this camera is that it stays in my jacket pocket (with the 14mm pancake) and I don't need to carry a bag to bring a camera with me.