Oberholser used to pitch the XE1 wedge, and now he pushes the C3i wedge. ?same company different name.
I have a 65 degree XE1 wedge, which is basically the C3i, for two purposes: bunker shots and trouble shots from DEEP rough.
I don't practice bunker shots enough to be consistent with normal wedges, especially under pressure during rounds. 65 degree wide bottom wedge gets me out almost every time. Also when in very deep rough (or on extreme hard surface), it also gets me out much easier than normal wedges.
On the other hand, it is not versatile enough to be used like a normal wedge for normal chipping, pitching, etc. So if your bag has room, it's actually a good club to have.
As others have mentioned, one does not have to spend big money. Other wide sole wedges are available on ebay, from Cleveland Smart sole line, Alien wedge, Tour Edge 1out Plus, etc.