I have similar toys that are longer and thicker that I've been able to take to the Hilt but they are very smooth. The sensations I feel as they slide out are insane so I got this one to add the texture of the bumps to this. Unfortunately this is not a flexible as my other toys so I haven't been able to get it all the way in YET but the way it feels when you let it fall out is amazing. It's hard to tell where the sensation is even coming from, it's just like a general buzz that got me researching Chakras and I would best describe the way it feels as the second chakra lighting up. The length is intimidating and exciting, it's not as flexible as my other toys but it is still very flexible which makes it easier to push in. The materials are high quality, smooth and strong. I can't wait until I can fit the whole thing inside of me, just writing this is making me crave it.