I have an Earth Machine, subsidized by the city. I think the city model also has an added screen on the bottom so rats can't tunnel in.

Smell hasn't been much of a problem but I do get flies. Stirring the compost regularly with a broken piece of pipe seems to fix the fly problem.

In Seattle we had a mostly-yard-waste compost bin (delivered free by the city, presumably because of the vast quantities of yard waste we'd put out) which was essentially two plastic lids with a stiff plastic mesh tube between them. This dried out too fast until we wrapped it in plastic, so is probably not exactly right for your climate.