I have only owned one Synergy scooter (Sport) and I didn’t keep it long enough to deal with customer service. I sold it after a month for something better.
I personally would go with a VSETT 8 over a Synergy. But that’s me.
I have personally dealt with Urban Machina multiple times (they are here in Vancouver), and have purchased 2 scooters off of them in the past.
I can vouch for their customer service. 😎