My friend and I stayed in the Luna Blue hotel for 4 nights at the beginning of January. It was really well situated, in the middle of Playa Del Carmen, just off Quinta Avenida.
The rooms were kept very clean, and each morning a new towel 'sculpture' appeared on our beds!
The only thing lacking was breakfast, but there were plenty of places nearby to eat, so this was not a big problem.
Very good value for money.