I can tell you who you should not use for a tour. I booked a tour through LASTMINUTE.COM for my daughter and son-in-law. The tour was handled through TOURICO HOLIDAY, Inc. in Florida; who used ENDLESSTOURS.COM in Cancun. Everything came back confirmed and that the agency picks up from all major Cancun hotels. After that I thought to use the agency for airport transportation but did not see the hotel we were using listed on their website. No answer when I called the Cancun agency. So I booked that with another company. That lead me to be really about the Chichen Itza tour. I emailed lastminute.com and was told the agency they use was a very reputable firm and lastminute had never had any problems with them. I again contacted them to confirm that they would indeed be picked up at the hotel, and was reassured yes and given a time. On the day of the tour, my daughter arrived early, waited for over an hour because the hotel told her many of the tours were running late, then called me. After many calls, I was told the driver had confirmed they picked her up; which was obviously impossible since we were calling to find out where they were. I asked that they get a shuttle to take them to the tour (its only 1 1/2 hrs away) and they could met up with them. NO ONE EVEN BOTHERED TO CALL BACK - I KEEP CALLING THEM AND NEVER GOT ANYTHING ACCOMPLISHED. IT WAS MY DAUGHTER'S LAST DAY IN CANCUN TOO!