Although I'm leaving PG in a week, I recommend them. Good company and great potential... Reasonably good odds to be the first YC company to go public. I can also vouch for Ben-G and the great work he's doing; we collaborated a lot on iOS.
Why would I say this about a place I'm leaving? An opportunity I couldn't refuse came up, but otherwise I'd be staying. I really think PG will do great things and there are a lot of great people there.