I leased an '06 V6 with zero problems and no complaints. Gas averages 19 or so between town and highway. Expect 12 - 15 towing close to 4k lbs. Braking is great and at 40k, I have yet to replace.
On the next go around, even though I prefer an old school set up, I'll probably opt for the four door Tundra.
The 4 Runner is a great rig and suprising how many features you get in the Limited. I would take it over many higher priced SUVs any day of the week.