Been playing Lead & Gold. Pretty much a TF2 with a western skin. The western flavor doesn't change much or not as much as I had hoped. The rifleman/sherrif is sort of an interesting class, but I suck too much right now to comment.
The interesting parts are the synergy buffs and the specific abilities. The rifleman's tag ability allows a team to mark a target where ever it moves, including behind walls and different floors. I am not sure if it gives a damage bonus on the target, but it seems when I 'tag' a person they die faster. It just may be from drawing attention to them. Not sure.
Could use a fifth class. I always like more class variations.
Synergy buffs don't stack, but it doesn't seem people try to get every class just for the buffs. The best maps/game are the ones where a team has to carry TNT barrels to specific buildings and blow them up, and the other side has to defend. Here, the armor synergy buff helps more than in a capture the flag map, just to protect the TNT carrier.
Ran into one bug so far, an invisible wall on one of the capture point maps. The worst part was that the invisible wall was right outside a capture point entrance, so I ran straight and found myself running in place as the other team ran out and mowed me down.