This is a silicone copy of the HoD600. It's a good introduction to denial as it's soft, flexible and easy to put on.
Read the whole review as it start out quite negative, but...
A few problems... it's very flexible which means it doesn't keep your member in place. If you get hard the silicone can flex up and allow things you pop out. You can also force this yourself to get out if you wanted to without too much difficulty.
The side rods can also come out without too much problems. Luckily I also brought the clear version and I use some of the central rods from that set as side rods for this with a cable tie between the three rods to keep everything in place. I even brought special ties for the OH that she keeps account of so I don't cheat.
You can still get a full erection with this, even to the point of poking through the end slot.
Urinating isn't an issue.
Positives... it's a good beginner set, if you want a bit of fun for the OH, before using something a bit more advance to see if you enjoy it, I would suggest to buy it.
If you want something a bit more intermediate go for the plastic version.