Seeing Eddie Van halen like that makes me feel old, and really want to bang valerie Bertinelli.
Shot version
gens: tell time, look great, fit well, short of the AD lady blowing you will give a feeling of self importance, and the cost alot.
rep: tell time, fit well (when you have it sized), give a good feeling when its a good rep, especially one you "built", but can leave you feeling anxious if near a serious watchfile and you dont want to get "made". Dont even go near an AD with it on.
Can make you feel "baller while sipping red bull and vodka at the "spot" surrounded by young ladies. O yes, the cost pennies on the dollar for the same gen.
O and the rep can self destruct at anytime, explode crystals, start and stop all by itself mysteriously, may turn a wrist green and potentially be fatal to you by toxic shock. Can fall apart or off your wrist for no reason.
Mind you a lemon-gen could do all these things but not likely.
Enjoy your new addiction. Its like heroine for your ego.