astrl, I only used the on camera strobe, and that didn't always fire. The visibility was fantastic 60 ft or more on every dive. I plan on buying an off camera strobe this summer.
scuberd, we originally we intended on heading to coz, but cuba was half the price. Cuba was a wonderful country and I would return in the future. If the U.S. ever drops it's restrictions I'd recommend it as a destination. If you do eventually get there, make sure to take a trip into a city and see some of Cuba off the resort, the people are extreemly welcoming.
Steve.