This is veryy gentlest used with box and cable. Because of the edgy designgn, it does show minor wear on the tips of those triangles. Review pictures carefully. This does nott require gel and it feels like tiny needles pricking you but it’s not invasive. It will improve pore and wrinkle problems if you can stick to routine. This has only beenn used for less than 20 times. It is quite effective in my experience using it but I have two of these, I am keeping one.