I've got one, a 2006, so I feel like I can chip in! I've got a cheapo 2 inch spacer lift on mine- just to get the height. She's my DD so I don't need much. Off road, I was and am able to get over most stuff, albeit with some care, with that lift and 29 inch tires. They DO rub a little at full lock. A mix of highway and city driving nets me about 19ish MPG if I'm light on the gas pedal, which I'm not, to be fair. All that's been done to mine so far is the lift and tires, I swapped the suspension components with the same OEM stuff because they were pretty squishy at this point. Hadn't been changed in the 140k it's been alive. The middle row, right seat, has a large enough space when the seat position adjuster is removed to fit a decent sized aux battery. I pulled the wimpy little tool box and third row out and replaced them with a 3/4 plywood tool box, that also brings the level up so that sleeping is more comfortable. Going to put in the aux battery with an isolator as well as add a roof rack and some lights in the coming weeks. I honestly love my Suzie, and even for being the biggest of the family, it's still pretty small and nimble. Word of warning though: I believe that the 2005 and 2006 XL7s have different bumpers, not just in appearance but bolts. I'm fairly happy with the stock stuff though, and i can probably fit a winch inside the stock bumper, but the aftermarket of bumpers for 05 and 06 is nearly nonexistent. There's one company in Aus that makes alloy bar for the front, but I'm not a fan.