Well, I got out today and put about 30 miles in the Ozarks Hills today. I ran mine and we had a demo camo yamaha with eps, and front n rear yamaha windshields. The rear window worked great and did keep a lot of crap from blowing in from the back. The "vortex" as I have heard people on here call it is completely eliminated.
This demo also had the heavy bed mat. I can say I do believe this unit was somewhat quieter than mine especially at low speeds. But, once I stepped on the throttle it seemed about the same.
I found the eps to be nearly unnoticable and was glad I did not spend the extra money.
We rode some very rough and steep terrain and on the downhills I found I really liked the engine braking. Even though I really dislike it on level ground. I have attached a couple pics from today. The Viking worked flawlessly and we had a ton of fun.