Let me put it this way, with the reviews I leave satisfied probably 8 out of every 10 girls I visit. So 2 average / disappointing punts out of 10 is not a bad return at all.
If there was no review system and I was just choosing girls blindly, then I'd be lucky to maybe hit 4 good punts out of 10 lol
So yes, reviews do help. They don't guarantee you'll have a fantastic time all the time, but it increases your chances greatly