I rode the Monster at Cedar Point which is a Eyerly Monster. I like the Monster more than East River Crawler because it spins more and is faster. The bad thing is that it takes forever to load/unload and check.
I disagree. The third ride I was lead at was East River Crawler, so I had to test ride a couple of times a day. I had that thing spinning pretty fast. Almost made me sick a few times.
I also believe that SFOG had a Lobster ride similar to the SC park, and that ride developed a structual problem with micrscopic cracks in the arms... At least that is what I heard from a former employee. Maybe the SC ride faced a similar problem. They don't look as durable as the ride in Gurnee does.