Good luck with implementing .ui support! Don't know how straightforward it will be :)
My findings: I think the library works pretty smooth. Speed should probably be on par with using just c++ (unless maybe you do a lot of conversions to and from Qstring?). I have not looked at the memory consequences. It's been a very long time since I've used qt and python, so cannot really compare, but I think the provided macros are pretty convenient :) One serious concern is that the cpp backend is required. Hence, if you use a library that does not work with the cpp backend, it'll be suddenly very complex to get everything working.
