From Wikipedia
The V-22 Osprey had 10 hull loss accidents that resulted in a total of 42 fatalities. During testing from 1991 to 2000 there were four crashes resulting in 30 fatalities.[1] Since becoming operational in 2007, the V-22 has had six crashes including two combat-zone crashes,[2][3] and several other accidents and incidents that resulted in twelve fatalities.[4]
The toll for this new technology is a little be high, may be too much.