You must also understand that with the proper meter you can use it for many more things. You can use it to check engine thrust angles and control surface deflection on the rudder, elevator(s) and ailerons, which is really helpful when setting up dual servos on seperate control surfaces such as ailerons and elevator. I use mine on every plane I assemble or build, whether it be an ARF or kit. It makes for a better flying plane when everything is setup just right.
I use the Hanger9 Incidence meter. [link]http://www.hangar-9.com/Products/Default.aspx?ProdID=HAN192[/link]