I have 3 of these making 9 levers, to be honest they are very cheap and you can use more than one which is good for bombers.
On the downside they can sometimes jump a bit so you sometimes have the throttle move by its self.
They are of course not a patch on my warthog throttled but I still use them for when I am in a 4 engine bomber, give you a far greater degree of control.
Plus I have managed to land a b-17 with the vertical stabiliser and rudder shot off but using 4 throttles.
If you can afford a CH go for that but these are OK I would give them 6 out of 10
They are $59.95 but you can sometimes find them cheaper if you hunt around the net. Link below will take you to the saitek page and you can look at the store from there.
Hope this has been of help
http://www.saitek.com/uk/prod/quad.html