Hi Pineapple, For me treadmill running can never beat being outside, on my favorite path. I don't have one at home, but I certainly use the ones at my gym and when I visit my mom. Sometimes, you can't beat it. Weather, darkness, air quality, traffic, etc. can all make running outside nearly impossible. Their cushioning surface is often easier on the legs, and you'll know your workout to the last calorie and hill repeat. In fact, there was an Alaskan runner who trained for her marathon solely on a treadmill, who won the 2000 US Women Olympic marathon trials. That much running on a treadmill would drive me batty, but different strokes and all that. If you're looking for brand recommendations, the only thing I can say is look for some necessary features, and expect to lay out some bucks for a good model. A sturdy base and a wide belt are both key, and look for something with a powerful motor so that constant running doesn't fry it. My mom has a cheap treadmill that has all of those problems, and it's a nightmare to run on. It suits her okay, but she only walks on it. One that is progammable is great if you want to throw in some hill workouts or intervals. Wait, here's an article from Runner's World with their 2005 recommendations... http://www.runnersworld.com/article/0,5033,s6-52-0-0-7807,00.html It looks like the picks start at about 600 bucks and go up pretty steep. If I were looking for a treadmill and couldn't afford those prices, I'd check the classified ads and garage sales. Treadmills tends to get sold cheap when people realize they've really just bought a huge clothing rack. Definitely take any treadmill you're considering for a test run. The article doesn't list the belt widths, which I would have thought was essential. Narrow belts make me tense up and make my shins try to cramp up. I've also accidently stepped half on the belt, half on the stationary base, and nearly did a face plant. No fun at all. And here's a longer RW article about treadmill running with some of their older picks. http://www.runnersworld.com/article/0,5033,s6-52-0-0-5915-1-1X2X3X4-5,00.html Hope this helps, and good luck! Brenda