It’s aimed at a general audience of children and adults, not just experienced climbers - there’s no need for climbing shoes, and harnesses are provided. (If you have one, don’t bother bringing it, they won’t let you use it.)
We enjoyed it though going on an extremely hot day wasn’t the best of plans; the only concession to cooling possible was some fans in the corners. I managed most of the routes although a few defeated me in their harder versions (most of them have two or three difficulty levels). In some cases the biggest difficulty was sweat making plastic holds slippery - I had to use slightly awkward grips to stay held on reliably.
The staff insist on doing all the clipping in and out (understandably given the inexperienced intended audience). All the routes have auto belays; among other things this means that usual rest between climbs while belaying someone else didn’t exist l-)
I thought it was quite expensive for what we got; specifically, for an hour climbing we actually slightly paid more than our regular trips which includes a train journey. Still, we had a lot of fun.