I do enjoy running outside, but there are a couple of pluses of getting this treadmill.
As Fall approaches, so will the rain. I don't plan to run outside in the rain.
I don't have any hills in my area, it's all flat. Since I hear that running on a hill can help increase speed, then I'll try it. I've been doing just that on the treadmill at work, but I can only do that for 10min at a time.
I found this video to help make the treadmill fun.