I'm having problems with mine.
1. I can't seem to be able to pry it out of my hand! Makes doing some things a bit awkward.
2. Tried my ipv-4s today, (in the other hand), Man, it felt terrible! What gives???
3. It's costing me plenty. My Wife says she doesn't want one, but I keep catching her eying it! Grrrrrr!!!
I know it's a money thing. ( I've got to have one of the few wives in the world who hates shopping or buying things, yet she NEVER gives me a hard time when I do. She was very happy that I ordered the Radius. (Whew)!
I'll be getting one for her soon!
Other than those few irritating things, It's GREAT!!!
Oh, did I mention, it's small, light, but solid, works every single time I use it, and does so very, very well?

I do keep loosing it in my back pocket. When I can pry it loose. Unlike the 4s that weighed a ton, and was always trying to pull my pants down. LOL
And They give us a hard time for lov'n our Provari toys! Double Grrrrrr!!!
Knife