Just saved this from the DE pile tonight on my feral druid. Didnt need the hit really (kinda wish it were crit instead) but it could come in handy.

The proc seems to hit for a little over 200 (a little lower then i expected) most of the time and procs fairly often in cat; maybe once or twice per mob.

Our enhance shaman loves this thing but unless you need the +hit you might not want to take off your hourglass just yet.