The DMUs proposed for use on the Vermonter would probably be very similar, if not the same as the bi-level DMUs being used by Tri-Rail here in S Florida. They're actually surprisingly comfortable inside and offer an extremely smooth ride, contrary to what you would think, looking at the cars' massive height. In fact, I'd venture to say that the upper level seating is as comfortable, if not more so, than an Amfleet I coach. In the center car (the "trailer"), the handicapped bathroom easily doubles the size and cleanliness of that in any Amtrak railcar. The cars themselves are very ADA compliant (assuming you have a center "trailer" car) and rival the ride quality of most Amtrak corridor equipment.
But I still think CRC DMUs are an outrageous and poorly thought out solution for updating the Vermonter... The description of the Sprinter's speed and acceleration especially is eerily familiar to what I've experienced on Tri-Rail. Even when there is NO freight interference, these trains simply can't keep to the time schedule because they don't accelerate fast enought between stations. Their acceleration is similar to that of a bus and seem to take up to three times as long to get up to speed as would an F40PH pulling three coaches. This is why Tri-Rail oftentimes operates at least one of their two sets with a standard diesel engine pulling just the trailer and one power car. They won't even bother running them at all on weekends. And I don't have any proof of this, but word is that they've been a terrible headache to maintain. Most of the time, you can see one or both trainsets sitting in the Hialeah shops.
If Vermont ever gets serious about buying Amtrak some new toys to boost their economy, they ought to wise up and research how their potential equipment will perform instead of picking out the newest, biggest, and shiniest toy on the shelf.