Writing this review as someone who has never been in chastity before, it's easy to be a bit excited as I pass the 24hr mark and tick off my first day spent all locked up in pink. It's a fun product, though, no question. So in spite of having no experiences to compare, I'm giving this the 5 star rating as a toy I'm sure will get a lot more use as time goes by.
One thing only time will tell is whether this is suited for longer-term wear. I hope so! The rings come in different sizes, which is definitely helpful, but all of them seem to have a way of "digging in" at this stage, and I am finding that it's time to take a break and make sure nothing's getting rubbed too raw. I feel you wouldn't want to run a marathon in this thing, but for wandering about the house, it should be perfectly comfortable.
Rings aside, the part that takes your shaft is comfortable enough that you won't even feel it sometimes. The device is not heavy. If you think those naughty thoughts, though, it'll certainly give you a nice, snug squeeze and force you to settle down again. Reminds me of a Chinese finger trap.
Small size is right. You don't have much room to grow inside this. However, it's flexible silicone, so the tube can lift away from the ring quite a lot, making escape pretty easy. The lock is more for fun, and it's probably possible to masturbate inside this if you're really motivated.
Quick and smooth ordering and delivery process, and Mistress K seems really good about replying to enquiries.