I had a beautiful days in the Bahia principe luxury sian ka'an adults only. It was peaceful/clean and very relaxing which is what I was going for. My only critique would be suggesting to go to one of the other attached resorts for more of a younger vibe. Myself and friend and 33/35 and most of the residents I the adults only were of retirement age. I was nervous to go off resort but if you want an amazing beach, ask the resort to get a taxi to the Tulum beach clubs. Club Mia was so nice. Also splurge for private transfer to the resort from airport. We arrived at 230pm at airport. But didn't arrive to the resort until 630pm because there were several pickup and drop offs along the way.