Yes I have played in games like this and in every game except one it really sucked. First of all role playing the second character went out the window. Most of the time the second character just rolled dice in combat or when the DM asked for spot or listen they had no personality and the players tended not favor one character and that character did all the talking.
Second it really bogged down combat. You are always seem to have one or two players who take forever to get through their combat round now add in another character and it came to a grinding halt or at least it felt like that.
Third you had players forgetting which character had information and just played it as both PCs having it.
Fourth it was funny how both PCs always agreed with each other. :\
This was in games with both extra PCs and cohorts. The only time I ever saw it work out was in a game with a player having a rogue cohort. They did a great job you could even tell who was speaking. The player had been our former DM for three years so I think that his DM skills at playing multiple NPCs helped with this.
Second it really bogged down combat. You are always seem to have one or two players who take forever to get through their combat round now add in another character and it came to a grinding halt or at least it felt like that.
Third you had players forgetting which character had information and just played it as both PCs having it.
Fourth it was funny how both PCs always agreed with each other. :\
This was in games with both extra PCs and cohorts. The only time I ever saw it work out was in a game with a player having a rogue cohort. They did a great job you could even tell who was speaking. The player had been our former DM for three years so I think that his DM skills at playing multiple NPCs helped with this.
![Devious :] :]](http://www.enworld.org/forum/images/smilies/devious.png)