I have commuted a few times with it and passed a lot of cars. It holds my fastest time for getting to work. I am more comfortable with a hat that has some foam sewed into it. Rear view mirror mounted on glasses of moby rider. With the canopy closed there is no other way to see backwards.
Chain pulleys just like the ones on a tour easy except much larger.
This uses a sliced innertube for a spring. My suspension and some body panels use sliced innertubes. I still think the chain management like a Tour Easy has is the best way to go. There are none of those complicated internal hubs, and the bike will still run without a rear derailleur. This my newest bent.