mertol wrote:Is the buttkicker any good? I heard you need a separate sound card to create meaninful output for it otherwise it vibrates to the low frequency sounds.
It does indeed vibrate to the low frequency sound, but isn't that the point of it? When you go over a curb you hear a low "brrrr" noise from the game (sorry for the imitation) which translates into a low frequency response from the butt-kicker. I think it is fairly accurate. The only downside at the moment is that my G27 shifter vibrates at very low frequency (the plastic of the shifter), so it is a bit annoying but I will try to fix this!
Another nice thing about that buttkicker is that you can mount it on your desk chair and listen to music, it does improve the musical experience! I have got a 2.1 sound system with a quite large subwoofer but the buttkicker adds something.
I would maybe not recommend it if you have to buy it new, but if you can get it second hand at a nice price it is a good addition!
In Assetto Corsa, one problem is that when you hit something it does that high pitching noise which doesn't sound right, and because of this you don't get vibration from the buttkicker. For example in Gran Turismo when you hit a wall the paddle vibrates because you get a low frequency noise, but not in Assetto Corsa. Maybe they will change this, that would be nice to actually feel a hit when you hit a wall or an opponent.
Could be interesting.
iracing curse strikes again... Or maybe that is the reason McLaren agreed to the deal in first place. Since they won't care about revealing info for their car anyway 
)!