I've seen her alone twice in Edinburgh and I have to agree with you.
First time must have been her first trip here. I went for a 30 min booking and she blew my expectations away. She was fun, creative and incredibly enthusiastic. I didn't know OWO was extra but settled for covered oral.
Second time was incredibly stale. I went in for an hour's booking, hoping to relive the previous booking, but it was nothing like that. First problem was the lock on the main door being difficult. 2nd problem was that there were cleaners working on her floor, one literally outside her door. I moved to another floor until it was all clear - of which I told her about it. She didn't seem pleased, saying that I should have just knocked anyway (WTF?!). Then the meet itself: lots of dry humping initiated by Sandra in the first 10 minutes, followed by OWO (paid the extra this time - wasn't that amazing to be honest), then followed by pretty stale sex. Popped in the bag and we still had 20 minutes left. Instead of trying to for round two, she just gives me a massage. At the end, she mentioned that she wished she'd seen me for a duo with Carrie_Love, which I did so the next day (FAR better than this meet since my attention was mainly on Carrie).
She's got a great body, but with her attitude and dental... I would definitely give this one a miss.