You can search for info on TPX and see what others say. not sure what is there
My son attended an event in Dallas. Keep in mind this is not a showcase like PG. You receive evaluations from the colleges at the event.
Quite a few schools at ours. We only had 10 (D1,D2,D3,JUCO and NAIA) The coaches perform the evaluations. If they like you enough - who knows but it provides you a tool to see where you are and what you need to work on. Some other events appear to have had 20+ colleges.
As a result of the event in DFW my son has been invited to a private workout with some other players to play before Texas, Baylor, etc - not all at TPX event was invited so I am not sure how this worked out.
Overall; well run and good guys.