Locks and unlocks easily. Seems well constructed. You need to find the right angle on the disc brake so that the alarm doesn't keep going off.

I lost one key and by the time I made another, the second one broke as well. There is no card inside with a code to make a spare key. I threw it away because it was left as a keepsake. Stay away. Get another model that includes a code for spare keys.

It is expensive but looks very fake, it is all plastic, I don't know if it lasts, it seems to me that if you drop it from your hands it will break the casing. If I had seen it up close, I wouldn't have bought it for this money.

It seems sturdy but personally I don't think it's enough on its own. Useful if used in combination with a lock/chain and alarm. Mine is overly sensitive and with a slight shake of the handlebar it starts beeping. The alarm is indeed not very loud.

It seems sturdy as the previous reviewers say.. I would maybe like it to have a bit more sensitivity. Other than that, it's fine. Always keep in mind to have a strap!

I have had it for about 1 month. So far, I am generally satisfied. It locks and unlocks easily. You can lock it without setting the alarm if you want. What bothers me is that the alarm is easily activated, so when I try to take off the hood, it goes off. I believe I will find a way not to activate it. The alarm is discreet and generally not very audible.