Luckily the Splinter Cell franchise has a good track record.
For single player, yes. For multiplayer, not so much.
My only real complaint is their unwillingness to fix major problems in the coop portion of Chaos Theory (the only coop support title thus far).
The stages that were released with the game were broken for about the first two or three months, it took forever for a patch. The new stages that were released in the last patch (which was released back in october), the same problem has plagued the new stages making them unplayable. A fix is no where to be found.
Other then this minor, yet major, problem the series has been fantastic.