I was in the same place. Like 14 years with chickens and never wanted or needed an incubator before thank you very much. Buuut, changing times call for creative measures.
OMG! I never realized how much I was missing out on an with the ability to order hatching eggs. ANY. Kind. Of. Eggs. I. Want. *swoon*
I ordered mine via TSC also using my coupon and knew in advance if mine so much as hiccuped wrong the manager at my store will make things right. Plus from what I read Harris is also (usually) good for customer service.
(...and I've been using Manna Pro products for ages!)
The smell- So far I have not noticed a smell. I don't let the water get grungy during incubation and the most I ever noticed is a warm egg smell on occasion when lifting the lid. It's not unpleasant, more like cooked eggs if anything. I know the styrofoam ones don't smell good, but these being hard plastic I would think proper care and cleaning is all that's needed. There is sometimes a little grossness (if you are squeamish) during normal hatching, but it doesn't smell at all. Not at all like assisting a farm animal birth, trust me.
There is however fuzz. Lot's of fuzz! When the chicks hatch there is left over dried egg fluids on their fuzz that sheds off as the chick dries and fluffs up. I did not realize how much there would be and it irritates my sinuses, much like regular dust, but if I'm careful not to rub or fluff up a chick under my face it's not too bad.