I bought one of the Originals (the 350w fatty) and it was an excellent gateway drug. I don't think that bike would be the success today it was in 2015. A 350w, 36v fat bike with a 10a controller is just not going to find a market - even at the $599 price point they were at. Still, I placed an order, added $200 shipping and within a week had this thing called an ebike, where that motor allowed me and my bum ticker to get back into cycling. And of course, I upgraded the hell out of it. On the night it arrived I had a 20a controller and a 52v battery in the thing after the first stock-parts test ride.Sondors bikes are still stuck in my craw. I watched owners spend significant dollars trying to make Sondors bikes better rides. Sure they were low priced but by the time they were, what I consider, street worthy another couple hundred in upgrades could have gotten a better ride. There are many happy Sondors riders, just not my cuppa.
The 48v 'X' models I bought my daughter and son-in-law had upgraded motors and I put in locally bought (in the EU) Magura 4-pots. The mechanical brakes on those bikes were a remaining weakness. I think Sondors finally, truly turned the corner when they shifted to the XS and MXS models as their flagships, which included all of the upgrades people had been doing on their own, piecemeal. The frames got quite a lot better as well.
They are by *no* means perfect, but I think they serve the market very well in terms of value for the dollar vs. features. Plenty of room for positions on both sides of that fence, though.