The best thing about the Maclaren's is the ease of pushing it. It spins on a dime and the front wheels never 'lock up'.
Have you ever been stationary with your stoller for awhile (say, stopped at a light, or pausing to decide which cough syrup in the store). While you are paused you probably automatically 'rock' the stroller back and forth (a holdover from when they were infants and seemed to need constant motion in order to sleep). Well, after you've been rocking it for awhile, the front wheels sometimes get backwards then when you try and move out your wheels 'lock up' and you have to sort of back up and THEN go forward. The Maclaren that I had (a Techno) NEVER did this.
If you look at the frame of the Maclarens the back wheels sort of sit under the baby. This is what makes them easy to turn, the wheels are very close to the center of gravity.
If money were no issue I probably would buy the Volo (though, if it were no issue, I would probably search around and see what cool stuff I could get, but I'm like that).
The Volo is, hands down, better made than the Kolcraft. For me the issue was how long were we going to continue using the stroller. We had pretty much given up using the stroller when I decided that we would probably need something for our trip back to America (something to contain her in the airport and catch her tired body during all the mall walking, zoo visiting, and museum viewing I planned on doing). Then I figured if I needed something I probably ought to go ahead and get it so I could use it in the interim.
I had NO idea how much we would use this stroller! I figured it would pretty much sit until our trip, but DD wanted to use it right away. She like that she got to choose (do you want to ride in your stroller, ride in the cart, or walk?) and she was old enough to appreciate getting someplace faster if she was riding.
So, we ended up using it A LOT more than I ever dreamed. It did help a lot in the airport, even if it carried our carry-ons more than it carried our DD, and we've used it almost every day on our trip. However, even knowing now how much we use it, I still wouldn't have bought the Maclaren (because DH would have gone into convulsions).
So it kind of depends on what your stoller use is like now. I can promise you that despite being in a completely different locale you will probably use the stroller the same. So, do you use it daily? Do you plan on having any more children? Will you be traveling by plane a lot (say back to the states for visits)? How big is your child? Will they outgrow the Kolcraft by weight soon?
Quality-wise the Maclaren wins hands down. It is sturdier, easier to push, and will last a lot longer. My thought was that at $20 ($10 for initial purchase and $10 for improvements) I can still replace it 5 times before I equal the cost of the Volo. I am shallow though, I go out and sigh over the other strollers, I envy those moms that have the pricier stuff that is sooo cute or elegant. But... I just can't justify the cost - for me.
One thing you might want to consider - a lot of the public buildings here in Okinawa (well, not public, more like shopping malls) have strollers for their patrons to use. Even stores like the 100 yen shops, grocery stores, and DIY (do it yourself) shops have baskets you can put a toddler into.
Oh, and the BX, it is the store on the military base, sort of like a tiny Walmart, that is supposed to keep our cost of living down and provide us with a few American amenities.
Jen in Okinawa
Mom to Noelle (2 1/3)
edited to add:
I was going to attach some photos of our stroller, but DH just confessed that he left some cables (the ones to attach the digital camera to the laptop) back in Japan. He said we might be able to get a replacement one inexpensively, if we do I'll add some photos, if not I'll post them when we get back to Japan.