I visited treff188 last year and wasn't that impressed...girls weren't as good as an average brothel and although you can have as many as you like (or manage) I got bored after 3 pops.
The girls aren't as engaged as they would be in a timed session as I think they get paid by the number of punters they see so it's a bit rushed.
Worth doing for a tick in the box,but I wouldn't go back