I wouldn't exactly call it wasting a booking, but I have had a couple of punts where, a few minutes in, it sort of dawned on me that there was simply no spark, no click, and that the WG who had looked so good in pics and profile just wasn't doing a damned thing for me, not her fault at all, just my particular buttons weren't being pushed by her, so the whole punt was me rather than the WG going through the motions and hoping that I might have a semi reasonable orgasm at some point.
I guess everyone is different, to some guys a decent looking WG with the right skills is all they need, but for me, and especially as I get older, I need a click, a connection on a personal level, and without it the punt is just drab and disappointing. I would never give a WG a negative review over this as its as much me at fault as her, the problem with profiles is that they can show the body and the enjoys, but not the personality.