This is one of the lift kits I'm considering. None of this is from my personal experience, just from what I have read so far while researching the kit, so take it as such.
This sounds like a good kit, but the springs are stiffer than stock which could make for a "sportier" ride. Some people have called it a rougher ride, but I think those were people looking for a softer spring rate than stock, and thus weren't happy with what they got. It's really all a matter of personal preference, and the only way to know if you like it would be to try it out.
Also, it sounds like AEV based the 2.5" of lift off a Jeep with their after market bumper, tire carrier, etc also installed, so your actual lift would vary with the weight of any other after market add ons you may have (which is true of any kit). If your vehicle is stock, you might get closer to 3" of lift just because it's lighter, though probably still not so much lift that you need to worry about front driveline issues. If you have thick steel bumpers, a heavy winch and a heavy spare tire and carrier, it might even be closer to 2". The only way to really know is to install the lift, give it a few days for the springs and shocks to settle, and measure.
Also, AEV sells drop brackets for the front control arms to let you correct the caster angle. Rather than having adjustable control arms, AEV went with these brackets with holes set for their three different lift kits. The brackets are included in their 3.5" and 4.5" kits, but for the 2.5" kit you have to buy them seperately. If you do get this kit, they would be well worth it.