- It's affordable. So affordable, in fact, that one of these and the cost of buying a bike rack and a couple spare inner tubes usually winds up costing less than renting a bike. Plus, going to Burning Man costs a lot of money, you're probably already spending a lot more than you thought you would.
- It's a good bike for the playa. Beach cruisers with knobby tires do really well at Burning Man.
- It's readily available. I won't post shopping links because I certainly don't want to advertise or promote one store over the other. You probably know your way around the internet enough to be able to either shop online or find someplace where you can pick one up either locally or on the way to the event.
- It can be donated to the Burning Man Yellow Bike (public bike share) program at the end of the event. It is the only make/model of bike that can be donated. The Yellow Bike program is standardized on that model (if all the bikes use the same set of replacement parts, the program is much easier to manage). This is especially awesome if you come from a long distance away or don't have a place to put the bike at the end of the event. This saves you the trouble of taking it back home (because abandoning bikes on the playa is not cool), and finding a place to donate your bike elsewhere. You get a new/reliable ride on the playa, and then the Yellow Bike program gets a new bike that they can put into service or turn into parts to support the program... it sounds like a win.
Remember, when you get your bike, pick up a couple spare inner tubes. They're inexpensive, and if you end up not needing to use them yourself you can gift them to any of the bike repair camps.
In the spirit of full disclosure - neither I nor the Yellow Bike program get paid by Huffy for endorsing that bike. My understanding is that they chose the model because of affordability, availability, and ease of repair. I not only agree with that choice, I think the yellow bike program is of great service to the community and if you're undecided in the bike department, I think you should support the program too.