Well, the longest trip I've driven on the Revo is from Karachi to Kund Malir (250 kms approx) and I found the seats much better than the previous Vigo (indus model). Didn't feel any discomfort or back ache.
Having said that, every one has a different physique while the seat design and structure of Revo is standard, so my experience might differ from other Revo owners' experience.
Mid-April I'll be going on a 4,000+km trip on it and will share my experience once I've completed the KHI-MUL-LHE-ISB-PSH-ISB-Shogran-ISB-LHE-MUL-KHI trip.
Till now I have 4,200 km on the ODO, the fuel average (tank to tank method) is 9.21 km / litre involving over 80% of city driving. Love the features and comfort it offers (considering its a pickup truck with it's inherent limitations).
Although I'm not the racing type, however, HP (power) is one area where Indus can improve it by tuning it appropriately. At it's current stock condition, you sometimes feel wanting more out of it's 3.0 D4D VNTurbo engine.