I have a 00 Montana (full load) which I came to because my 740 Turbo simply wasn't up to the task of hauling around 3 kids and a Lab anymore. Got the vehicle a year and half ago with 66K on the clock, now it's close to 88K and it's had all the usual problems. Servo pack in the tranny, $700; intake manifold gasket, $1100; the rest has been pretty much routine maintenance, tires, shocks, brakes, ..etc. A pretty mundane drive but practical. With the 7 seat set-up you can configure things pretty much anyway you like, in many ways this set-up is better than anything other than that which you find in the latest vans. The self leveling rear suspension works well, it keeps the unit from doing what many other vans do under a full load, sit on their ass and plow through the corners. Fuel economy isn't bad unless towing. On day trips with all aboard 26 - 28 mpg but towing a tent trailer 16 - 18 mpg at best.
At the time I bought, the main alternative considered was the 99 - 00 Odyssey but with double the mileage they were still $4K more. So even after the intake manifold and servo pack work, the price tag was less. I know the Honda is a much nicer ride, well kind of. The handling is better on the Honda but on those early versions performance is no less anemic.
According to my mechanic, aside from the two major items mentioned, these vans don't really suffer from too many other problems. Being NA you can no doubt get a bad one but in the town I live there are tons of them and most seem happy with them. Having said that, I can't wait until my oldest turns 18 and I can get rid of it.