Well .... just to add to the brush fire here, after purchasing an E-Bike to replace my 29'er, I decided to upgrade on my Krytonite U lock. After many hours of reading, watching YouTube, and anything else I could find, it came down to two locks: the Kryptonite LS M-18 and the Abus Granit 540 X-Plus. The deciding factor, for me, is the key issue that Kryptonite seem to have over time of the key sticking, jamming, or just not working, so opted for the Abus. Pretty much every review gave it a 4.5 to 5 star rating, and the only bit go confusion I encountered was its' Solid Secure rating. I have seen it rated as both "gold" and "diamond" and I think ART gives it a 3.5. The only other two locks that seem to do better are the Granit 59 and Hiplock D1000 (at $350). Anyway, I think I'm good as I dont live in a city, rarely go to a big city, live in a rural area and the biggest place I may be is in Bend, Oregon (close to me). Interesting reading on the thread, though. Oh, and I am in the process of putting an Abus Cafe / frame lock on my Trek, this week. I don't think I'll opt for the associated chain, yet.