Has anyone used Neverland Motorcycle Covers? They have a XXXXL size ( 300 x 120 x 145 cm) which seems a bit bigger than the others on the market.

 

Yes, I've used one. The XXXXL is enormous, good for a large touring bike with a tall windscreen and full luggage. It's a decent budget cover. Material is thin, so don't expect heavy-duty weatherproofing. The extra size means wind can get underneath it easily; you'll need to tie it down snugly. For the price, it's okay for dry garage use.