My install took forever, but I'm used to that since I never use the windows partition, which means that every time windows boots, it takes a while to get itself updated. That and really I don't worry too much about installation times.
General criticisms: it runs like a windows program. That is, it has its own interface that really doesn't look like any other interface I've ever used, so I have to learn that particular program. It also seems to require a lot of clicks that really seem to be just version of "are you sure?" That said, its about what I expect anytime I boot into windows.
A few problems with word wrapping on the character sheet. My eladrin racial features text get cut off when they go outside their box rather than wrapping to the next line. It would also be nice to be able to set font sizes.
The power cards are nice. I can't say that they are perfect, but they are really good. I do have some complaints about the formating though. First, it would be really nice to have an easy way to cut them out. A slight amount of space between each card, those guide lines that show where the cutter should start, etc. Something so I don't have to think much to cut the cards free. Second, it would be nice if you could arrange them such that the static ones are on a different page. If I have a few vials of alchemist's acid, I don't need to waste toner every level to print the same card out, similarly fey step is the same regardless of level, as are my wizard's cantrips.
The good: I think this program has done what none of the 3e character generators was able to do, make using stuff outside the phb options work as well as the core options. Of course, the big test of this will be when martial power comes out, but so far I've been reasonably impressed.