I never had one until about a year or so ago. I found I relied on it more than my regular oven, although I'm sure that's more about the fact I'm single than anything else.
When I got to NC I knew I wouldn't be here more than a year or two so I decided not to bother buying one. Now, even though I may be moving back in a few months I think I'm changing my mind.
Since I've really started exercising and watching what I eat, I actually try to stick to serving sizes as stated on the package.
Today I made a sandwich and a "serving" of french fries. It was 11 fries (I won't even bother getting into a discussion about 11 fries being a serving for maybe a FOUR YEAR OLD)
It really seemed stupid to be heating up that big oven for 11 fries