I personally only like using it in combination with a rubber loop, for some reason i cant feel the shock inside me, only slightly below the skin surface on the rubber loop when it has proper conductivity. But don't get me wrong, this thing is excellent and a must-have in my case.
It fits well inside me, its relatively small compared to what i can handle, i could probably get the biggest available in the website, but having this one is more than enough for me.
My gf once told me when i was upset: "size does not matter", i think now i understand her. lol.
ADMIN:- Sensations will only be felt at the nerve endings and the reason you are feeling it on the loop is down to it being a smaller contact point and therefore it will be more intense, if the Flange is used on its own the sensations will always be focused around the opening that the Flange is in as that is where the nerves are.