Railfanning in Utah

Overall a fantastic experience, with a no hassle trip. Slightly disappointed with the rented unit, inasmuch as it had 95.000 miles on it and it showed, despite being supposedly a 2015 or newer vehicle. Not that nothing didn't work as advertised, but would have liked a "fresher" feel to it. Cleanliness of the unit was also slightly below standards. Again, nothing in particular, but it was not spotless (like slight spots of mildew in fridge and kitchen range could have been cleaner).
I was also under the impression that 110V was available, albeit in a limited manner (no for AC or Microwave) from an inverter when under way (not hooked up or wIth generator running). Maybe it was and we just didn't figure it out.
Finally, and absolutely minor, a better radio/stereo/audio system would have been appreciated.
As a rounding off feature, and NO fault of the RV Rental Co. but definitely a diesel powered vehicle would have been highly appreciated. It defies our logic that such a big "truck" would be in this day and age petrol powered. A turbo-diesel engine would have been way more fuel efficient. It is something we shall definitely look out for in future RV rentals.