I will not bore you with the details....but this document sums up the situation pretty nicely. The Marines say the machine is a treat. Non-Marines freely discuss and document their criticisms. Read it and form your own opinions!
I say it is still a Turkey!
Read the Casevac example for the US Embassy in Kabul.....that alone shows you the fallacy of the Marine Corps argument about how capable this thing is. The GAO and several other US Government Agencies tasked to review the Osprey Program pointed out other glaring problems in the anticipated replacement of CH-53D and CH-46 Helicopters by the Osprey.
http://www.fas.org/sgp/crs/weapons/RL31384.pdf