Installation was a breeze. Have about 400 miles using them and there are no issues or any noise. Oh yeah, they work great as fenders. I bike in the rain in the Seattle area. Iï¿½ve used SKS before and like these better.
Purchased this for my wife's Specialized Como e-bike because it offers far better protection than the Kryptonite cable lock she was using. A surprisingly large lock makes it easy to properly secure to immovable objects. Lock mechanism is incredibly solid when engaged. Mounting to some frames may be an issue due to weight/size as was the case for my wife's small framed bike so I ended up carrying it in a small knapsack. I feel the sturdiness / ruggedness of this lock definitely would encourage bike thieves to find an easier target.
I had to go to a 5.5" Kryptonite lock as opposed the 7 inch version in order to fit the bracket and lock within my bike frame. While a 7" will give you a bit more wriggle room to lock your cycle to a secure object, the 5.5" functions very well. I have had no problems securing my bike properly with this smaller version.
Lock is very solidly constructed, weight is reasonable and lock mechanism makes for a very tight, secure fit. No lock is entirely fullproof, but this one most definitely requires some extra effort to defeat...enough to encourage a would be thief to move on to easier targets.
This lock is not going to protect your bike for very long, if not used in conjunction with a larger locking system.
But,if you want some piece of mind in situations where you would usually leave your bike unlocked, this lock is a great candidate. It's small and light and prefect for gas station resupplies and bathroom trips. For cafe and coffee stops.
My only issue is that the locking and unlocking function can feel a little stiff and sloppy. And there is a small learning curve to getting it to run smoothly.