ABUS U-Lock Granit XPlus 540, Bike Lock with XPlus Cylinder, High Protection Against Theft, ABUS Security Level 15, Black/Grey

No ones stolen my bike yet if that changes I will update my review.

Far heavier than expected. Wont fit ladies Trek hybrid when trying to lock bike to small diameter bike rack.

This thing just rocks on so many levels. I feel confident using it at almost any location

Excellent lock very sturdy and easy to use. I love the light so you can see the key hole. I would recommend this product.

Great lock; my daughter has a girls bike and it didnt really have anywhere that we could mount the lock so she has to carry it in her backpack when shes riding. But it is very sturdy and we feel that it provides great protection for her bike (on a college campus). She uses this lock to secure the front wheel and frame to the post, but also uses a Kryptonite chain to lace through the rear tire (not as a secure, but faster than using 2 U-locks).

I loved this bike lock for the 6 months I used it. I made a mistake under stress and the lock ended up falling from 2.5 feet onto concrete, which caused it to basically shatter. I tried snapping it back in place but the key wouldnt lock anymore. There goes $120.

It broke when I dropped it on the ground.

By and far probably the best lock out there. BUT, the key is starting to be sketchy, after a year or so. Im worried one of these days itll just get stuck completely and my bike will be trapped.

Very heavy

Industry standard. Slightly better security than the other brand but not that much better for the higher price. I think they need to contact NASA to develop a material to resist diamond saws and high-leverage cutters. GPS locators and alarms probably would be better.