It's awesome. I have upgraded a few months ago to the Nexus S and I see little reason to go for this one. I will sit this one out and wait for the next in line. It's everything Nexus S is, except it has a card slot. With 16 GB on board, I hardly feel the need for that, as it takes longer to fill a card than the life span of these phones.
Will hold out until the next Nexus comes out. This is awesome hardware, though, I can tell from the looks/feel of my phone. Blows my friend's iP4 out of the water.