Generally, I'd say yes. Some do add a fair amount of content for the price, such as Shivering Isles, whereas some are just not worth it. Case in point are multiplayer maps. I can understand if you play multiplayer a lot you will likely get hours out of them, but I still think they are too much. Call of Duty I find is the worst, because it's the only game that can get away with selling for RRP of £44.99 and charge 1200 points for 5 maps, 2 of which are old ones.