IMHO they are worth every penny. It depends on your use and EXPECTATIONS. I was thoroughly disappointed with the handling of my 2015 F150, 90/10 street/dirt, so much so, I was gonna trade the thing. First, the truck would bounce all over the road at speed. Was dangerous! Second, it wouldn't hold a line thru corners(we have these tight, windy parkways here in NY IE.Taconic State PKWY). My wife was terrified to drive it. I now have 2.5" ICONs all around and LOVE it! The truck handles like a German sport sedan. It holds a line thru corners and soaks up everything from 150 yo cobblestones to VW sized potholes with a smile. I HAD Fox 2.0s on the rear and removed them for the ICON CDCV units, which I run at #4 all the time. My only regret was not going for the CDCV up front. IMHO, they could be a tad stiffer. If you value handling and performance, DO IT! They ROCK! The ride is firm, level and quiet. There are no vibrations, rattles, taps, creeks, "boing"s or other annoyances. I suppose it feels more like an F250?
If you can change shocks, you can install them yourself with ordinary tools in a couple hours NP.