Fun to use with lube. I didnt grow as much as I thought, but girth impoved. i overused, 2 times a day for 3 months,. Last time was in the chamber 20 minutes before a loud pop which broke the seal (and therefore the kit itself). 100% gained extra foreskin. Never suffered permanent damage while using.
Better to use while standing. Im debating on getting one of these every 3 months or spending more on a quality made pump. Buy one if curious, wont work as well if you're a casual user or sensitive/premature ejac, takes lots of pressure to withstand. I literally used mine until it popped.
You may not gain inches, but im sure you will at least gain extra hardness and have better erections by 3 months. Buy for fun, dont expect result unless your motivated. Exercise doesnt work for everyone but if worked for me