The only thing that didn't go well with me was the prices that they were charging for everything from trinkets,meals,drinks & yes,even ice cream. Cancun is geared to much towards the American Dollar & their prices for everything are way to high. I would recommend going to Playa del Carmen instead of Cancun because their prices are a lot more reasonnable, your dollar will go a lot further.
These are very interesting people to be around. The tourist trap part is everyone has something to sell. When we went deep into the market we were approached with selling of illegal things and my husband was asked if I was for sale. He said it would cost hima lifetime to pay for me I was very expensive ha ha!
Watch out for all the vendors. If you would like to do some shoping go into town were the locals shop instead of the tourist shops near the hotel strip. Luckily for us we are hispanic therefore was able to hagle the price down to a more reasonable price. One item they wanted to sell us for 20 pesos we ended up buying for 5 pesos. Be careful.
We got suckered one day when we saw a big iguana on some rugs and we went over to touch it. The guy asked if we wanted to take a picture and I said 'sure'. He put us down in chairs and before we knew it he had put rugs and a sombrero on us and he put the iguana on our lap and then he said 'I charge 100 pesos to take the picture' and he was using my camera :-). So he got me there.