I think I decided on rental. Not gonna bother fitting out a beach cruiser with clipless though.
I'm staying at Riu Yucatan. I've heard very good things about it. I've heard both that it is dangerous and also that there is nothing to worry about. Supposedly if you stick to the resort areas you're OK. I heard there's a rental place across the street from the hotel. Bringing my bag, a camera and some granola bars. They have the beer there already. Expect some photos on my return...I leave Friday. TIP, if you're interested I can let you in on whatever I may learn down there as far as biking and such.
Or if you already know, perhaps you could give me some pointers as far as being careful with money and life. Not so much worried about money, money comes and goes. Don't want to lose my life though.