Absolutely vital! There is no way that I would have accurately determined my sizing without these. They helped me to avoid the trial and error, with wasted money, that some men have had.

This is a great idea...allows for home adjustments.

Company product is very good and customer service is very positive.

Love the concept and the fit. Sorting out the fit of the tight sized glans ring. Appreciate how helpful the company is to work with me.

This is an awesome product! Fits perfect and is the most comfortable device I have ever used. Was able to wear it right off the bat with no adjustment period. It’s very good quality.

This product is awsome. It was super comfortable right off the bat. Didnt even need a break in period. Been where it for seven days in a row with zero problems.

The larger glans hood made a difference in the device comfort.

While the ringd on the sizing kit will do the same thing, the tubesmade it easier toreally test the fit. Recommended.

Nicely designed and very helpful in deciding the right size.

Easy to order, fast shipping.

It's fantastic! So comfortable! I hardly know it's there after a while.

Awesome product and customer support!

As with the sizing kit, getting these examples to test for fit were worth it. Easy to use, and more accurate than a tape or string.

Very positive about the kit. Measurements are so important. This makes it do much easier. And more accurate. Definitely worth the few extra dollars to get it right.

The device is 100% secure. If there was someway to get off, you could never get it back on without your keyholder annoying which is wonderful. It’s extremely comfortable. I’ve had it on for five days straight with no issue right out of the box. I think the key is getting the sizing rings to make sure everything‘s right the first time. I think size one is a little short and I’ve ordered a longer one but other than that it seems it seems to do what is purposes.