I sell quite a few Rage heads, and it seems to be a Love, Hate relationship. Either a guy Loves them or Hates them.
Most complaints are the O-rings, Blades breaking, lack of penetration, and on occasion a broken ferrule. IMHO I think they are one of the better expandables on the market. My preference in mechanicals would be Spitfire XP's. Snypers also being a good choice.
I personally prefer a rugged well made fixed blade broadhead, but I admit the mechanicals are tempting. A couple of failures and you do tend to lose your interest though.
Dan