My son's experience with Showball Showcase 2011 LA was great! Great Coach interaction & instruction. Many coaches from creditable programs present. Several coaches expressed interest after evaluation was given. Summer before Sophomore year. Signed up for same event for 2012. Son was unable to attend due to issues with travel team conflict. SB would not refund money, understandable I guess.
PG runs a fine showcase program, son attended two.
I would recommend both, but for different reasons. PG Showcase is a must to get rated by a third authorized party and gives the exposure you are looking for. PG tourney's give you scout & RC exposure as they draw many.
SB gives you the opportunity to be seen by mostly local schools. My son was contacted by 30% of the coaches that attended the showcase and the conversation continued until the narrowing down process played out.
I would say to attend the these early for exposure but then focus camps at schools that you are interested in and ones that are interested in you.