After a failed attempt to steal my bike, I have to say that this specific lock is not suitable for certain semi-floating discs (e.g. ktm 690).
Despite the fact that it is difficult to break and cut, in my case, they simply removed three of the rings that hold the disc in place, resulting in it being able to move slightly and create enough space for the lock to be removed without needing to be cut.

Very good, compact without being 300 kilos and difficult to break. The only downside is that now that I have disc brakes, it doesn't fit in any of the 2 disc brakes, so I can't use it. Just check before you buy it that it fits in the disc

Reliable and high-quality lock for use primarily between the disc brake and the wheel, as the lock's axis cannot fit into the openings of the disc brake.

The worst thing for this money. After a year, the safety that held the fire broke with minimal force while the wheel turned. Of course, the string from the reminder was cut very quickly. If I knew it would break over time, I would have bought two cheaper ones to do my job

Excellent lock, I have it for many years on several motorcycles but on the latest one I have, the Honda SH 150, it doesn't fit on the disc brake because it has small holes and I need to buy another one!

Sturdy lock, very good construction. A bit large and it finds the spokes of the wheel. It is not very user-friendly as the part where the key goes rotates when you lock or unlock it, so you have to hold it steady with the other hand.

If you have MT-03, it doesn't fit! You struggle a lot to put it on! Otherwise, it's fine!

It is a good disk lock with sufficient weight and sturdy quality. The only downside is that during installation and removal, because the back part goes through the wheel, the hand almost always gets dirty. So either a clean wheel or dirty hands. And the reminder string got cut over time! Other than that, in the two years, it didn't need any oil or anything.

Just bought it, after a lot of searching I ended up with this one, it looks very good, time will tell of course, the only negative thing is that it doesn't have a long enough string to hold onto the handle, it can be held but it should be longer

Small - sturdy - heavy, with a commendable thickness of firewood,
the only thing left is to never learn its resistance to violation attempts!!!!!!

I have it for 3 years, and it works perfectly. It is user-friendly once you learn it. Occasionally, it needs a little WD40 for rust because it gets exposed to rain. The plastic strap it has on top has come off due to wear and tear and needs to be put back in place. Other than that, it does its job perfectly.

Sturdy construction and high quality, small in size compared to other options available, very thick and rotatable shackle, just like the lock which makes it difficult to break with a wheel and lock picking.
A bit pricey for what it is... but I suppose you're paying for the concept behind it!!

After 3 years of use, the lock works perfectly every day. Very good build quality and it seems to have a good level of difficulty for anyone attempting to tamper with it!

Very good lock. Difficult at first but gets used to it. I put it upside down on the front disc brake so that the key is inside.

The only negative thing is that the string is too short and it broke. (At least for v-strom).

The name of the manufacturer says it all. Quality, safety, reliability. I use it every day. It seems difficult to breach as it rotates. Of course, in an expensive machine, other tools are needed for 100% results such as an alarm, chain, GPS tracker.

It is a bit difficult to insert the key at first!
Apart from that, it is a very compact lock.
It definitely requires both hands to install it.