I inherited the Toro my grandfather bought for me to mow his lawn with back in the early 80's. I adjusted the original drive belt and it worked great. I gave it to a friend when I moved across the country and it is still performing well.
I'm glad everyone else loves their Toros. I have a Toro lawn tractor with a super-cool auto-style transmission that won't go into reverse, and the dealer tells me that, due to that wonderful, high-quality tranny, it'll cost me hundreds to fix. (PS... don't assume that, just because a Simplicity mower costs 3 times as much, it will last for 10 years).