My experiences of VS2005 have been pretty positive. Yes, I've been hit by the background compiler bug, and the slowness of it (although I bought another gig of RAM to get around the speed issues, worked great, it was only a few quid anyway).
In my mind, despite these issues, my productivity has gone up a lot using it. Generics! Better databinding, the new datagrid, superior XML support. And it's just so sexy!
I was one of the ones on here in October giving Microsoft the whole JUST GIMMIE GIMMIE GIMMIE!! And they did, and I'd much rather have it in the state it was released in than wait until say, now, just to get it.
Basically it's like having a Ferrari that stalls on you every few hundred miles. Yes it's stalled, but GEEZ, YOU HAVE A FERRARI.