Good and sturdy with a very powerful alarm. The 6mm lock is relatively decent, the thicker ones are more durable but are difficult to fit into the disc brake, while this one went in smoothly. It doesn't rattle at all, which is a positive. However, 2-3 times it hasn't activated and one time when I forgot, it didn't sound the warning and almost killed me. Of course, you could say it was my fault for forgetting, but even if you always remember every day, there will be a day when you forget, and if the alarm doesn't go off, you will fall down and the bike will fall on top of you.

The watermelon is rubbish! It breaks for no reason! I almost got beaten up by my neighbors! It also fades easily in the sun! I wouldn't buy it again! I haven't had it for even 4 months! Don't waste your money!

Very good and high-quality product, after 2 months of daily use there is no problem, it is not as sensitive as a kovix one but it does not have any false alarm cases like the kovix that would go off for no reason many times... I highly recommend it.