The lock secures well, although the required rotation is a bit tiring until you find it. It seems durable and not easily violated. Not too heavy, which makes it practical to use. The intensity is satisfactory. I did some tests and realized that the alarm stops before the key is fully inserted. So I activated the alarm again and lightly touched a screwdriver to the lock's groove, and it stopped beeping (and then disarmed, it only beeps again if a key is inserted and manually armed from the button). So the alarm can be deactivated by anyone, after that it depends on how much persistence and time someone has to break the lock. On the positive side, the pin has the correct diameter and fits snugly into the disc brake, so it is not exposed to being cut. If you are not somewhere very central or do not have immediate supervision, I would recommend something better.

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I'm coming back a few days after the purchase, the alarm stopped working completely. It makes some strange intermittent beeps and greets us. It wasn't even exposed to rain or dropped. What a shame.

I have it for a year.
In the positives, when you touch the machine even a little, it warns you and on the second touch, it hits.

In the negatives, the alarm is not very loud, you can't say I will hear it from far away.

The biggest piece of junk you have released. It never works from the moment I bought it and it uses an expensive lock. Stay away from this useless product. It's money down the drain.

Sturdy construction, powerful alarm sound, proper sensitivity that doesn't go off with the slightest movement but only when the engine is shaken. It has three high-quality keys and a cover to prevent the lock from getting dirty. The battery is easily replaceable with the key provided in the package. Be careful, as soon as you purchase it, you must open it to remove the battery from its plastic, otherwise it won't work.

***UPDATE 01.10.2020
I come back a few months later with unfortunately bad news.
While I was removing the disc lock from my motorcycle, it fell from a height of about 20 cm and since then the alarm stopped working. At first, I thought it was the battery, so I replaced it with a new one but with no result.
I am greatly disappointed since the product is extremely sensitive and even with the slightest impact, so in case of an attempted theft, the thief can render the siren useless with a single hit...
After this, I am forced to reduce the stars to 2 as I essentially feel like I wasted my money on something that didn't last more than a few months.