I love my ESTREAM EVO AM4 , but I agree with Afren. There is little manufacturer support, even if the dealer himself means well. My battery failed in 1st 6 mos. Only charges 80%. It'll take 1 mo. minimum to get another. I think Bulls offers the best value, but knowing what I now know, I'd prob. go with 3 other brands first. But I'm glad I have that powerful Brose motor, it's best in class, IMHO