My son and I dove with Dive Palancar (DP) last year. It's your typical resort dive op, bigger boats and a wider variety of experience amongst the divers. Slip the guy at the counter $5 or $10 every day or so, ask nicely and you'll be able to pick the divemaster and/or boat that you prefer.
On site facilities were adequate, lots of storage bins. It got kind of crowded around the dunk tank when all the boats came in after the morning dives, but not a major hassle.
The dive masters were great, very conscientious and attentive. Of course, a $5 tip per tank doesn't hurt their dispostion....
All in all, a good experience, especially for my son, since it was his first warm water experience.
However, having said all that, this year we're going back to the Allegro, but we're using a different dive op (Scuba with Alison). Not necessarily a reflection on DP - I just wanted to try someone different. Alison runs a single 6-pack and has no problem picking up at the Allegro dock.
