The monte carlo stock is a functionally good design and can be very attractive as well. The use of a Monte Carlo comb allows enough drop at the heel of the stock to make it work well for offhand shooting while still providing good cheek contact for a consistent hold.
This stock design is not as good for shooting prone, for instance, because a good prone stock requires much less (if any) drop at the heel.
If one simply shoulders a rifle with one of the popular "modern classic" styled stocks, he may find that a good portion of the butt actually sits above the shoulder. In this case, a stock with a bit more drop at the heel will work better but the comb may be too low. This is where the Monte Carlo comes in and it works well.
Monte Carlo stocks don't have to be grotesquely styled and there have been many very nice stocks produced by custom makers over the years. Regards, Bill.