OK, here is the good with the bad.
The good is that they are a decent tire at a great price. They are air pressure sensitive but the ride is good with 45 PSI front and 40 PSI rear for my P/U empty. Note: you must air up to haul a load (80 PSI). I drive about 60% city, 30% highway and 10% off off road (Ca. desert). Tires work very well at the right air pressure in the desert (35-30 PSI). Just returned from a 90 mile off road trip over 2 days and never even hinted of getting stuck (sand & rocks etc).
The bad is that they are very noisy on the road, are cupping a little and are wearing fast. I am guessing they will be worn out at around 30K miles or so. On road handling is only OK. I might buy them again because of the price.
By the way do not ever buy Michelin truck tires. Before the Hifly's I has a set of Michelin LTX tires and 3 out of 4 had bad tread separation on the same trip with 50% tread remaining. After 2 weeks of jumping through hoops with Michelin they voided my warranty saying it was because I had Armor-all on the tires. That's right the excuse was because i had Armor-all on the tires. Went up their chain of command and they all refused to honor the warranty. The tire rep at Allen Tire said Michelin tire never honors a warranty - period.