it's funneh against some chars ... always use the fsmash to reflect fox's Laser xD and then lough at them with evil bowser laughing muhahaha ... but that's more funneh with Ness , you got 10-20% , he like 1-2 ... ok , can be good , when you predict something like ... let's say a snake isn't timing his granades perfectly , so you can reflect them ... if he times them perfectly , they just blow up in your face ... can be good against Samus and Lucario , if there in kill % and you read them ... if it wouldn't kill , just heal yourself ... ok can be good against tink maybe , when they spam some arrows and boomerangs ... can be good against d³ xDD ... if they get a gordo (oh how these spikey-things are named) and you reflect it , it's also funneh and usefull ... maybe against Rob's down-b ... don't know , if Lucas fsmash is fast enough , when Rob's down-b is fully charged , but it should be risky ... maybe it could be usefll against spammy Olimars ...
but it's always funneh