We totally dislike Playa. Been there, had enough.
HTR is a fave for us--4 visits and none were disappointments.
We have no need to leave HTR--taxis are useless for our trips--the nature reserve there provides all we want. It's AI with a great chef, so why bother leaving? We don't go to Senior Frogs, etc. That's not our idea of a real vacation. When we want to relax at an AI, we don't leave the property. We have a regular driver we use to get there if they don't offer transfers. Still undecided--but thanks for the tips!