On the beach there are some guys renting sky jets; we were almost tempted to rent one. Luckily, we saw on our room desk a letter from the hotel warning about these guys. Apparently, they rent you the jet and when you're back they start blaming you scratched their jet and that you need to pay them for the damage done. They ask for a ridiculous amount of money ( for nothing) and if you don't pay they start to be rude.
Not sure these are the guys you want to get into an argument with.
Take the jets elsewhere.
An important warning: buy directly from the stand owner and stay clear of people who walk up to you and try to sell you food or try to act as "mediators" between you and the sale. Usually it will be "Papasi", - drug-addicts who try to leach on the tourist and take them for a ride, money-wise.