Jeff,
I own it but have not begun to build it yet. It looks to me like typical Collect Aire which is to say some parts are very nice and some are, well, not. The panel lines are nice as is the canopy, but I can't comment on the fit. As for it being buildable, the first (and only) resin kit I have built was the Collect Aire SU-15 and, while it was difficult, I loved every minute of it. For the MiG 31, I'd recommend getting as many references as possible and perfecting your super glue skills in advance.
One of the nice things about Collect Aire is that when you come across parts that are j