Hello. I have a 2024 F150 Lariat Powerboost hybrid. I bought the hybrid to get the 7.2kW generator with the 30amp plug in the bed. I have not yet used the 30 Amp setup, but have used the 20 Amp outlets in generator mode. It's a bit quirky - you need to leave the truck "on" for the generator to power the outlets. It's not smart enough to turn off the radio and it stays bluetooth connected to my phone. I've used it to power a portable refrigerator (IceCo). It's probably good to leave the AC on in the summer, as the cab gets hot trying to keep the inverter cool.
I get between 9 & 10 miles/gal when towing the Legacy Elite 2. Wind direction affects mileage quite a bit. This is not much better mileage than I got with my 2006 Nissan Titan with a V8.
Even when not towing the trailer, the mileage is probably about the same as you'd get with a regular V6 Ecoboost - probably due to the added battery weight. It doesn't run on pure battery very often. Only at really low speed on flat ground or downhill. Again, I didn't buy it for hybrid driving reasons - I wanted the big generator and 30Amp capability.
I believe the Powerboost ONLY comes in the 5.5ft bed and crew cab, independent of the trim line. This is why there are no 6.5ft beds on dealer lots.
I've had it 7 mo so far and like it. It is loaded with tech (most of which I don't need), but I really wanted ventilated seats. I'll post more once we've used the 30Amps for boondocking.