Out of the gate this watch is a MONSTER, coming in with a tiny case at 51mm and overall thickness of 22mm! This is Oris’s largest mens watch in the collection currently and would be for most other companies as well. The ProDiver has the Oris RSS (Rotation Safety System), helium escape valve, and the watch is rated to 1000M. The current safety for setting the timer on most dive watch bezels is to rotate it counterclockwise. This way if it gets bumped, you only think you have less time and come to the surface sooner than expected. With the ProDiver you pull the ring up, turn it to the desired time then push the ring down. This locks it into place, eliminating the worry of unknown tank time.
Pros - Simply put, this is pure manliness!
Consideration - Size