Trailers like that with conventional spoked wheels seem to hold up better. The wheels can be maintained at any shop, and a lot of the time they use standard BMX parts and tires. The Schwinn/Instep fabric seems less durable than the Burley fabric, but I see plenty of both out and about. Burleys are more likely to have actual kids inside tho... it seems like parents prefer the bright yellow for keeping the trailer visible.
The chainstay mount does make for wider cornering, but not by a lot... and it does act to prevent wag the dog and jackknife incidents, which are real high on my list of not fun.