I’ve never used any of these I’m afraid. The most I’ve gone too was £350 and that was an ex Porn star called Bambi (some years ago now). God she was so hot, wish she was still available for meetings. Lol.
However when I finally get back to London it will have been two years since I’ve had a meeting so I’m looking at maybe saving up and using one of these agencies and spending some time with a model like lady
The only thing you have to be careful of is some of these girls are listed elsewhere at much lower rates.
Not necessarily the ones you list but I have noticed this with others.
The one other thing you have to watch out for is of course the "photoshop" effect. Some of these are model portfolio photos and in reality they don’t look that much more special than those in the 300 range. Again if they are offer lots of services and are really into the meeting it could well be worth it.
With regards to services I have found reviews on here for some of these 600+ Girls and even at that level some still don’t offer kissing, etc. so I admit you have to be careful and confirm everything beforehand if you can.
Good luck.