For the price of around 25 euros, it is very good, much better than others that cost 50 euros. I have experience with the Olympia LKL107, the blue one that costs 48.5 euros, and the Stop Long, the green one that costs 50 euros. In terms of quality, this one is better. Its axis is made of iron, not steel like they claim, which can be cut with a saw. Its side cheeks that grip the steering wheel are made of cast iron, a common material. There are some imperfections in the safety mechanisms that secure the cheeks with the arm, and they have put some stickers that easily come off. They don't even have glue and the safety mechanisms, which secure the axis with the cheeks and the lock, are visible. Otherwise, it is more sturdy than the previous two and definitely cheaper. In terms of injury, it is very heavy and the weight presses on the steering wheel, leaving indentations on the plastic foam inside. The corners of the cheeks also cause indentations on the steering wheel. It's not the best, something else needs to be added there, otherwise there will be a problem with the steering wheel. As for the windshield breaking feature, it's nothing special. They have simply made the tip of the baton sharp to serve that purpose. It is small in size and fits very well in the storage compartments in the door, while the previous ones didn't fit. Its length when closed is 44 centimeters, so it can easily fit in almost all cars. I would definitely prefer it again. I have had it for a few days and it seems practical and good. I will come back after a few days if I see something different. The lock is a bit strange, it is made of brass and the key is also brass. It doesn't have a very high level of security, I can say that. The construction is very simple and not considered sturdy. Although one cannot easily insert a large screwdriver due to its circular shape, it's not a big deal. However, if someone wants to remove it, they can cut it with a saw, usually cutting the steering wheel, which is definitely softer. But if they want, they can cut the axis. There is just a delay, which might discourage most people in this type of situation, even if they are sturdy. They cut the steering wheel and remove it from there. I will come back after 5 months of continuous use. The lock starts to stiffen and work difficultly. I tried lubricating it, but it's the construction and the key that are very peculiar, so it stiffens. I do not recommend it. I would not buy it again. After a few months of use, the lock had a problem. The hole for the key is not in the center, it is on the side. It doesn't offer any additional security either