I purchased a 350W MotoTec scooter from these guys. I received the product I ordered as agreed. There is nothing wrong with my product. And while it is pretty heavy - I am 57 and have connective tissue disorder and I assembled it by myself. The scooter I purchased is built well enough if you assemble it right, which was easy to do. Do not worry about the left over parts. The manufacturer actually sends spare parts. Bearings, fuses and extra locking bolts. Keep those.
Personally, I do not think that this scooter would perform well for anyone over 200 pounds. I am 145 and it is GREAT for me. We will do a weight test this evening.
The sales staff is mostly unpleasant - but don't worry you're not special. That is just the way they are. Don't expect them to be nice because they just are not pleasant and they do not care. Just place your order and hope for the best. I was very worried and feeling negative about this purchase. I pretty much wrote off my $$ as a reminder to do better research when I make an expensive purchase.
SaferWholesale surprised me, though. My scooter is opening up a better life for me. I would buy from them again.