Solid Mobile Phone: First look at Windows 7 beta 1

I've not had a long time with Windows 7 beta 1 (given the holidays) but I've played with it long enough to form a few opinions:

There are no new features in this build. If Microsoft has any new stuff lined up for the RTM then we're going to have to wait to find out. Features-wise, build 6.1.7000.0.081212-1400 is similar to earlier builds I've looked at .
This beta is of excellent quality. This is the kind of code that you could roll out and live with. Even the pre-betas were solid, but finally this beta feels like it's "done." This beta exceeds the quality of any other Microsoft OS beta that I've handled.
Performance of this beta is exceptional. I've not had a chance to benchmark it yet but it feels snappier and more responsive than earlier betas I've handled.
Judging by the quality of this build, I expect Windows 7 to be released June/July of '09. I really can't see Microsoft dragging out the release a year.