I have to agree, quality can be found anywhere, I recently found a great one on BP - however, that said I do like to see _multiple_ positive reviews on TER - that confirms or supports the providers promises. I have only had them visit me - my place, my rules. This puts me at ease and makes me happy - which is the goal I think. I have noticed that personal chemistry (surprise) does play a role in the experience. Sometimes it clicks and is epic and some times it's just friction. In any event christophtrac is correct - research , research, research.
To guarantee a great time open the lines of communication and I am sure things will go as planned. Voice your wants as maturely as possible without being graphic. I.e when it rains do u require a raincoat vs do u suck dick without a condom. Also references and being screened breaks down the wall. Good luck and happy hobbying.