Completely useless... wasted 24 euros, truly wasted... it doesn't even work for the smallest potholes... If you have any sharp corners, forget it... I thought that if I bought something more expensive and not the cheapest ones for 7-10 euros, it would do the job... what a joke...
If you also have a Japanese car, it will strip the paint (!)... the gun is a joke, it takes 20 minutes to warm up and has a cable that's only 50 centimeters long... You need to hug the hose...
If you want results, just get 2-3 tools, even if they're professional... otherwise, don't bother... it's better to use a suction cup with hot water... forget about it...