I set it up so it's keeping me stretched at just over my erect length (around 6.6 NBP). I believe in total if you used all the rods it goes to about 8" or smth.
The main benefit I'm feeling is sensitivity. Since using it sex has been feeling incredible, legit the orgasm is so good that I feel satisfied for a week.
If it breaks I'll get the silistretcher. I already had a phallosan so I figured id get this accessory. I'm gonna be doing this for at least the next 3-5 years so who knows what's in store later