The on-off button is useless, as it constantly shuts off on its own due to vibrations

I had it for years for light tasks such as cutting pipes for clothes in closets, hinges on old wardrobes, various trimmings, and I even cut several thermostatic valves to make handles.
The tool is fine up to this point, except for the inconvenient switch it has, that small sliding safety switch on top of the main switch. If you wear gloves, it doesn't easily unlock.
Recently, I wanted to make a new line for water pipes in cemented ground and I thought of engraving the cement with a diamond stone disc so that the compressor would create a smooth groove.
I made about 20+20 meters of deep grooves effortlessly, but somewhere along the way, I overdid it.
It made a "puff" sound, the safety switch tripped, and it gave up.
If I hadn't used it for a task it wasn't designed for, it would have lasted for many more years. I bought it in 2014 for €35, and today I bought the same one on sale for €24.99.

I have it for two years. It does its job. The problem is that the tightening button broke to remove the disc from the first uses. I would not recommend it!!!

3 times tighten, loosen, the body broke along with the button...
I asked a friend who has it and got the answer: 2 of them have broken in their hands...
It suffers in the body and the button, even though it has a powerful motor...

The switch is good in terms of price, but it is difficult to use. The body is quite thick to hold, but it is usable for amateurs

I use it occasionally, for grinding and cutting thin sheets. For a 500w wheel, it is rather heavy and, worst of all, it has a very thick body - so it is not comfortable to hold and it quickly becomes tiring. The guard is secured with a screw (disadvantage) and easily comes loose when there are vibrations. The gearbox gets very hot even without much strain.

For the tasks I use it for, I never needed more power than it has and its weight is satisfactory, although it becomes tiring for the reasons mentioned above. The plastic and finish are fine for its price, but the start button doesn't inspire much confidence. However, with the gentle use I give it, it has lasted several years without anything breaking yet.

I have it for 4 years with a broken disc changing mechanism and a broken on/off button, and with some adjustments, it only works for a few cuts before the motor burns out and I give up on it so it doesn't burn on me.

After a few cuts, smoothings, and grinds (not even 10), the button that you press to tighten or loosen the wheel broke. Also, the start-stop button was not easy to use at all. It's not worth its money.

It does the job, but after about a year and during grinding work where I had to hold down the button for about 3 minutes straight, the button started sticking, resulting in it not closing!!! I had to forcibly remove it from the socket. Also, very heavy, you will understand it when you need to hold it for about 3 minutes in your hand.

The mechanism of the counter (the button we press for tightening or loosening) is very weak. From my experience with 2 wheels, I can tell you that on the first one, it completely broke on the third time I used it, and on the second one that I have been playing with, after the second use, I am afraid to loosen it. What I don't know is if I got a defective batch or if everyone has this problem

And the reason is because on the first use, the button that you press to change the disc broke. I sent it to my dealership, they fixed it, and it happened again