Our Raptor is holding up real well. Bought new tires (Maxxis) two years ago after a blowout with our Carlisles and this year finally replaced our 2 orig 12v batteries with 6Vs. All in all I have to say its a well built unit..my only issue is the genset wants to die a couple times before it wants to run. Sputters a bit on a load with my wifes hair dryer too.
The truck is like a different animal...ARP studs, new oil cooler, EGR delete, CAI, 4 inch exhaust from turbo back/cat delete, Edge Insight CS with EGT...SCT tuner with a tow tune, AMSOIL synthetics. Ive got the tow boss option with 4:30 gears and solo it really wants to get up and go. For the first time ever I got to double digit (LOL, 10 mpg) towing last weekend on a short 50 mile trip.