I recently used the Firestone Destination AT's for a summer tire on my Yukon. They lasted me for a couple of seasons before they wore down to a point that I didn't want to use them again and sold them.
Honestly I never did really like them. I can't tell you specifically what I didn't like about them. Maybe something as petty as the looks, but I didn't like them.. Running Michelin cross-terrains's now for summer, and they are way better than the Destination's.
I have no experience on the Revo's other than they look good?
EDIT: BTW, I have nothing against the brand name Firestone. In fact I've tried almost every winter tire there is from most manufacturers. I've settled on Firestone Winterforce as being the best winter tire you can buy! Couldn't tell you why, but they have the most grip on snow and ice than any other tire I've ever tried. And without studs to boot!
I guess to each his own... I took off and sold brand new Cross Terrains as they did not handle well in the dry, wet, snow or ice. One of the worst tires I ever owned.....JMHO
Any reason why you purchased the firestone's for a summer tire?