I got the 225/50R16s on this week, and the mold release is worn off.
16x7 Motegi MR12, 225/50R16 Falken Azenis 615, Konis with 525/425 lb/in GCs, Aussie rear bar. -2* front camber, -1.5 rear, 0 toe all around.
Fit: not bad. Fills the wheelwell all the way, and it's close to the stut and fender but doesn't rub at all.
Comfort: Pretty stiff, and really, really loud. I mean REALLY loud.
Transients: repsonds pretty linearly and quickly. I'm at 40psi all around but I'll probably go 40-45f and 35r, which should help.
Steady-state: mad grip, nice breakaway. Almost zero tread squirm unshaved. A real improvement over 205/55 MXs.
Accel/braking: Once they spin/slide, there's not much to do but get off it and let them hook up again. Pretty decent grip though. These are VERY heavy tires (~25lbs) and hurt acceleration, but the extra grip seems to be worth it. I imagine I'll be faster on corner exit than the MXs due to lack of wheelspin, but only the clock will tell for sure.
Overall seat-of-the-pants impression? Hardcore tire. It feels really good and I can't wait to push it. Divisionals this week will be the real test... results on Monday!