Bring your own gear. Familiarity breeds comfort and, though some rental fleets are well maintained, they are subject to very hard use and many are disasters waiting to happen.
- You'll know how your own gear works. It takes awhile to adapt to each new piece of gear and during that phase you're not completely in control. With a little practice, you will be able to use your own gear with your eyes closed.
- You'll know how your own gear has been maintained. Of course, this presumes you actually maintain your gear.
- You'll know what disgusting diseases the last guy that chewed on the regulator or urinated in the wetsuit had.