I agree on # 1, I put my olympus FL 36 flash on it just to try it out, and it worked... but the flash and the camera wouldn't "talk" to each other... But no worries, just bought the Canon 580ex
So far it is great! I bought it used, but basically was brand new. It doesn't need much to recharge.... I shot 11 pictures without any pause between them. It is A LOT better than my FL 36