I just got the Holy Trainer V3 in last week. It worked, but it didn't fit as well as I would like it to. I ordered another one, and I'm selling this one for $125 plus free shipping in US. It is the Standard version with 45mm ring. It comes with 2 keys and a Holy Trainer pouch to hold it in. I've only tried one other cheap metal cage, but this one felt great. Hopefully my new one feels better lol.