I "almost" got married at Me Cancun this past spring. I planned to marry there but then swine flu killed tourism in Cancun and the hotel closed temporarily (days before my wedding)- the rest is a soap opera story (yes...I was already in Cancun). Despite that - I love the hotel - decor, vibe, that it's not all-inclusive, location in Cancun and overall service.
I didn't experience any significant problems with email communication. Great menu options. There are options of indoor and outdoor reception areas. There is a VERY limited beach area and would be extremely difficult for a "sand in your toes beach wedding". There is however a fabulous covered area facing the ocean which shelters you and guests from the sun (bonus).
I may have some pics to share and I'll be sure to post what I have. During the time that ME "closed" they did some updates/renovations so I'm not sure what may have changed.
ME Cancun is an adult only property. There is an adult euro vibe throughout the property all day long - from the aromatherapy to music piped in everywhere, sex and city movie playing by the elevator lobby and the DJ at the pool. Definitely a sexy hotel.
I would strongly suggest a site visit. That confirmed it for me.