How fast you will see some result, will vary from person to person, but put away the ruler for at least 2-4 months. Be sure not to overdo it, but if it feels safe (your penis feels fine ), increase tension little by little, and if you outgrow the setup in the extender, add some bars. They can be found as 0,5 inch, 1 inch, 2 inch length on ebay. It will take long time to grow an inch, but it is possible, and beyond if you’ve got the time and devotion. The number of hours per day will of course vary, because we all has things to do and a job, and it is very difficult indeed to hide the extender under trousers, it will show and everyone will look and think you’re hung like a horse.