Stayed in Westin PVR for one night in June. The pools are very nice as are the swim up bars. Beware of the time-share hawks who are everywhere. We drove past the Sheraton, it does not seem nearly as nice as the Westin. Both the Sheraton (Hotel Zone) and Westin (Marina Vallarta) have beaches that are almost useless. The best beaches in PVR are south of Los Muertos. I second the recommendation of staying at the El Camino Real. It's a nice property and staff is well trained. I heard Liz Taylor used to stay there. Beach is probably the nicest in PVR but don't expect clear waters.