I have had my '91 going on just about a year now and using it as a daily driver. Mine has 207,000 on the odometer and, honestly, I am very happy that I got mine. It has never left me stranded (one exception, which was my fault. Low coolant which caused me to overheat. No damage done, caught it in plenty of time). I never question, when I turn the key, if it is going to start, and I would not hesitate to take it out on a 600 mile trip. I would, during that trip, check the oil often, as my Valve Stem Seals do need to be replaced, but I could drive it like it is forever as long as I keep topping off the oil. I might use a 3/4 quart every 1000 miles or so.
It has a few minor irritations, which any 25 year old truck would. It creaks and moans a bit when I hit a bump too hard with my steering turned ll the way. Something I'm sure, the cause of which, a good inspection of my suspension system would reveal. Also, my turn signals do not blink correctly every time I use them, most of the time they are OK, but not always. But I am completely content driving it just the way it is.
I do little projects to it all the time, but it is not my intention to sink a crap top of money into a $2000 vehicle. I just want something reliable, that is cheap and easy to maintain. My entire situation is going to be rethought though, as I will be receiving a brand new Ford F150 as a company vehicle in the next month or so. I never intended to sell the Montero, but it may be on the horizon.
ETA: Almost forgot. I consistently get about 16mpg with mine with mixed highway and city driving. Although, I have to do a lot of 25mph driving, and without that, I think it would go up a bit.