What are: Pros and Cons of Air Bag suspension?

[gehidore]

I've got a 1969 Suburban 2wd that I was thinking of bagging.
The "stance" I want is a slight rake to the front, 2 inch drop or so, yet would like to be able to raise the rear up when I pull my car trailer with a large load.

Air ride has always impressed me for the ride quality it provides.

Can you use the rear coil replacement bags in conjunction with the rear coil "air helper springs" ?

for some pro's and con's of the after-market airbag suspension kits like the ones that http://www.brotherstrucks.com sells.Just looking


I don't plan to do any notching or anything of that sort so if it hits the frame or wheel wells then she's too low :P