No smells. If it does you're doing something wrong like too wet or too much food added all at once.
Mine is a very lazy efficient process. We collect kitchen scraps in a one gallon composting container on the kitchen counter and once a week I spread them on the top of the top most bin and then cover that with dried leaves collected in the fall.
Every two months or so I harvest by taking the lowest bin out of the stack, dumping it out and picking through it for worms. That's not a required step but then I will add some of them to my grow pots to keep the unicorn poop flowing.
That empty bin then goes on top of the stack and the cycle continues. Each of the bins has drainage holes all along the bottom which allows for the migration of worms through the stack and air holes along the top rim.
I use the castings for top dressing plants, making my JMS and JLF's, adding it as a component in my grow mix, adding to my fertigation water, making biochar, and probably a few other things that don't come immediately to mind. I also collect the leachate in a container which can be used, diluted, when fertigating. The leachate is not as good as worm casting teas because not all of the liquid has gone through the worm's gut which turns it into a magical product, but it does have its uses.
This is GREAT stuff!!