We're back and we used YVR's long term parking. The lot was ok. Didn't think the lighting was the greatest but was adequate. They still had mounds of snow in the lot which made for parking in some spots a pain.
We didn't have to wait for the shuttle to long. To the terminal, we missed the first shuttle because it was full but only waited another 5 mins before the next terminal. The shuttle was at its pickup spot when we returned so no wait then. However, it was packed with some people having to stand.
Payment and exit was relatively quick but not as fast as Park'N Fly. They only had one cashier lane. We waited behind 3 cars for a few minutes. Cost for four days was under $40 and I got my Aeroplan points.
I'd probably use it again. However, I do like the convenience of the valet service at Park'N Fly where they have your car waiting and you just jump in and go (of course you're prepaying and needing to call when you arrive back in town).