My night vision has been completely fine since the surgery, with no major haloing or aberrations. I do not know whether this is a function of PRK vs LASIK, a good doctor/procedure, or luck. (Maybe a bit of all 3?)

Did you get the TransPRK (SmartsurfACE) procedure? I ask because people from the US typically go to Canada to get it since its not available here. Seems like the much better bet for long term results vs Lasik.

I got LASIK in February for my -6.75 vision, and my night vision now seems the same as before the surgery. I've had no complications at all.