We are looking for an electric scooter for our 12 year old son. There are 2 scooters from X-Treme we are interested in. The first is X-Treme X-560 and also X-360. Does anyone have any experience with either of these? I have read some bad reports about X-Treme products on the internet, that some arrive damaged from the factory and it takes months to get replacement parts. Is this true?