My wife has been using Amigo scooters continuously since 1983. They're extremely well-designed, so that they can be troubleshot & repaired by owners with minimal effort. (When we were living overseas for 9 years, we could obtain parts by airmail and replace most major parts ourselves.) And, it's 100% US made in MI.
As a rehabilitation counselor, DW keeps aware of almost every product on the market and still recommends the Amigo line -- if the client has money or private insurance. Here in Florida, Medicare will only pay for the cheapest product on the market, which Amigo will never be! If you need a seat lift (which full-time users frequently prefer, so that they can reach counters and transfer downhill), Medicare won't -- by Federal law -- pay ANYTHING for your "Personal Mobility Vehicle".
So, it's a matter of "You get what you pay for".