I own an St2s, and an ST5. . . my M1 Evolution has been pre-paid and is "on it's way".
I bought my St2s from Lenny as well. Best investment I ever made. Lenny wasn't local, but when I finally did have slight issues with the bike, I took it to a local Stromer dealer, and, guess what? The Stromer dealer fixed it . . . no charge; because that's what they are supposed to do.
Lesson #1: If you buy your Stromer from a far away shop, and you take it to a local Stromer dealer, and they refuse to repair when it's still under warranty. . . be glad you didn't buy the bike from that local bike shop originally; because that's not what they're supposed to do.
When I decided to buy another E-bike, I researched and decided on an M1 Evolution. I went to the closest dealer I could find. . . 300 miles away. I decided to trade in my pseudo Stromer. . .
Specialized Trans X Crapy Ebike. The store gave me credit toward the M1. I put the rest on my credit card. The transaction took place in March of 2019. I was promised the bike in June. . . I'm still waiting.
Here's the somewhat ironic twist: The store I bought the M1 from used to be a big Stromer dealer, but they dropped their dealership, why? They claimed Stromer had poor customer service. The bike shop then became an M1 dealer. I'm not sure how customer service can get much worse than a customer paying for something and then not getting it. I'm wondering how they feel about Stromer now? Please don't misconstrue this. I'm not commenting on the M1's performance. I did try the Evolution and that's why I bought it. I also tried their other models, and, well. . . no comment.
I was now down to one Ebike, which is dangerous for me, as it is my main means of transportation, and I don't have any enablers. That means if my bike breaks down, I can't press an app and expect someone to show up and make my problems disappear. I needed another backup bike. Meanwhile the light on my ST2s was going out (they are expensive). Mine was still under warranty. I went back to my local (not where I purchased the bike from) Stromer dealer. He ordered me a new light and tried to put it on. It turns out Stromer received lights that were not wired correctly. So if anyone from Stromer is reading this post, my case has been opened now for several months. If there have been any updates, please let me know, as my lbs has been active in resolving the issue. The high beam on the light still works.
In retrospect from experience: I have over 10,000 miles on my ST2s. Did I have issues with the bike? Very few, and with the exception of the light, they were resolved instantly. And not from the dealer I bought the bike from. . Did I mention the extra capacity (blue) battery stopped charging? Stromer's response? A brand new $2000 battery was handed over instantly. . . no questions asked.
When I was attempting to get my ST2s' light repaired. . . by my lbs. . I saw an ST5 on the showroom floor. I tried it. If you're a Stromer owner, I don't have to tell you what I thought. Needless to say, I bought the bike. It turns out I could have bought the bike a bit cheaper if I would have gone to a different bike shop farther away, but I didn't.
If my M1 does ever show up, I'll be more than happy to compare and contrast.
That's my experience, and that's all it is. I'm not posting it to dispute anyone else's knowledge or perspective. I have owned 15 different ebike models. Without exception none have been faster, more reliable and more pleasurable to own than my Stromer.