Thank you Anya & Scotsman!
Anya: free weight, I once had a trainer watch my form but that was awhile back, he said it was good.. taken with a grain of salt. I go to parallel, sometimes I'm too tight to get quite there, but close if not parallel. No bounce at the bottom. I guess I'll see on Saturday how it feels when I squat again, and not go to failure this time round.
Scottsman: Thanks for the tip on the support, good to know if it comes to that.