I think it is one of the safest options in bicycle security. It has the highest rating in terms of safety, it is ergonomic, it does not endanger the bike from scratches, and it has a sturdy construction. In a few words, you get what you pay for. It has served me very well, it requires a little practice at the beginning in unfolding, but nothing special that makes it difficult to install.

As written, it is heavy but easily fits onto the frame. The key only comes out when locked correctly, overall it is perfect for bike security.

It is indeed heavy, but with the placement on the frame, it does not create a problem. Excellent quality and I believe it is superior in terms of safety level. There is some difficulty in length and shape, but it is not a significant issue. It is worth it.

It is heavy but includes a base that easily attaches to the bike frame.
It is covered with elastic material so it does not scratch the color of the frame. If it is not locked correctly or if it is open, the key does not come out, so you can be sure that it is locked.
Its length is generally good but a bit restrictive due to its shape. For example, you cannot secure it to a DEI column.
In terms of usability, it is close to the pedal but a little more flexible.
I found it on sale somewhere for around 80 euros but it is worth every penny