I and my partner each have Stromer ST2s. I bought mine slightly used off eBay over a year ago & my partner got his from Crazy Eddy a few weeks ago. Anyhow, I needed to have the Shimano gear shifter replaced and took my Stromer into REI as REI had a special on tune-ups during Earth Day weekend.
While there I learned that no one in the REI bike dept. had attended any Stromer training, although they had a couple of other Stromers waiting to be fixed or tuned. That gave me pause, but I left my bike anyway, and when I picked it up several days later, the shifter was working, but noisily. I now plan to take my bike for future adjustments to another Stromer dealer in my area (Santa Barbara, CA). My partner will do the same.
It should be REI’s responsibility to register your bike. Surely another REI store somewhere in the country has had experience with registering Stromers and can educate your local REI on the procedure.
I should mention that while setting up my partner’s bike—with a torque wrench—I inadvertently broke the seat post clamp. I ordered a couple of replacements from the local ebike shop, and they arrived 6 days later. I’ve been really happy with my Stromer and know that there may be less familiarity among ebike repair shops with their repairs. My approach is to encourage them and help them succeed. The bike shops will prosper, and my Stromer will keep working!