I bought and installed the SAM-1 fan and light. I think it's great. HOWEVER, I do not like the exterior outlet, nor its gasket. I left my OEM outlet and flapper on for now.
A driving rain can enter the SAM outlet grille. Maybe it will never happen to you or me, but it could. The gasket is a foam material that I've seen disintegrate in outdoor applications. I don't know what kind of foam it is, but I know I would not trust it. Why they didn't provide butyl tape, who knows. I think they mean well, but I don't want to be a water intrusion test dummy for them. I can't figure out why they didn't use a downward opening outlet like have been on RVs for decades.
My hope is to take the flapper on my OEM unit, and cut out the middle of it and affix screening, much like the SAM one. Then it can stay latched.
Edit: going back to the earlier posts, it looks like most of you SAM users kept the OEM outlet too.
2014 Sunseeker 2300 Chevy