I did not like it, and would not purchase it. But as a free gift it works ok. The vibrations are pretty week. The cock ring is loose fitting, could be tighter (not that I am small, it just does not work as well as the more expensive stretchy cock rings). It only last for 30 minutes. I had the first two not work at all for me.
I didn't LOVE this cock ring, but it got the job done! Since it was the first cock ring I ever tried, I'm glad it helped me to see that I love cock rings, and I'll definitely be trying more in the future!