Like many of the previous comments I have found SAC to be unfriendly, it was as if they didn't want my business the instructors being very off hand and SAC members being unwelcoming. The approach at Phoenix was totally opposite but the atmosphere from SAC spreads over the whole airfield. I went to Gamston for my re-validation.
That was some time ago but subsequent visits have shown no change and the current correspondence seems to back this up.
Gamston is far more friendly and very good to fly from.