I don't have the posts or threads saved, but I have yet to read anything glowing about the spa at GC. I haven't personally tried it, and I would guess if they were completely horrible they couldn't stay in business, so maybe the people who posted caught the spa on "off" days. I would be a little leary of tring it though. I would check out the place before making an appt, maybe swing by the front desk to make the appt rather than doing it over the phone.
If you do a search the threads should pop up. If you go, please post about your experience too!