Hi Anna,
I looked at pretty much every 4 1/2 - 5 star in the area through TripAdvisor. I looked at Dreams Cancun and a few others in Cancun, but my preference was for a smaller place like Playa del Carmen. I know a lot of girls have done site visits and have found them really helpful. I personally didn't do a site visit nor have I been to Playa del Carmen (although I have been to Mexico and have travelled a lot). To me it's more exciting this way, but that's just a personal preference. A lot of girls prefer going and checking into a few properties.
I would suggest emailing Zulma again to see about the date you are interested in or perhaps phoning. The communication hasn't been the best and I find you do have to persist a bit w/ emails or be quite patient.
The main reason I decided on the Royal was that it was a five star that I loved the look of and had excellent reviews, and w/ the option of kids being next door. I loved the look of a few other properties, but they were mostly adults only, which didn't work for me. Having the sister property next door that allows children (and children for the wedding day at the Royal) was a big draw for me. Another big plus for me was the location right by 5th ave and the fact that the beach doesn't seem to have the erosion problems that I read about for some others.
Hope that helps!
Heidi