When we were shopping for a new trailer over the past 2 years each and every time we would come back to the 2109S as the trailer for us.
We have had tent trailers, and prior to our Minilite a Chalet AFrame. This time we wanted what we felt would be our trailer for the next 10 years (hopefully)
The 2109 had a few floor plan items we preferred. The rear door with the fridge right inside is convenient and you are tromping through the trailer to get a drink. Its not far ether way I know. The rear door also is nice as we have a dog so those early morning bathroom walks for the dog don't end up as disruptive and don't allow a bunch of cold air to the bed area.
The coach vs dinette. We never used the dinette in the tent trailer, never used it in the AFrame, so a coach just made more sense for when you wanted to sit back and relax. We replaced the heavy table with a light 4 foot folding style. We also looked at using TV trays instead of the table. We try and dine outside as much as possible.
Counter space is better in the 2109. I would have liked the larger storage at the back in the 2104 but its a minor trade off. The newer models do have the shower door rather than the curtain. Its not a big deal for us.
We did consider the smaller 1809 but not having the walk around bed and the furnace under the bed was a deal breaker. I turned the furnace on in a 1809 and it vibrated the entire bed. So unless you are looking for that I wouldn't recommend it. I just know it would bother me.
We do a lot of boon docking and this trailer almost seems to nice to drag down rough forestry access roads but the quality of it was better than comparable floor plans of other manufacturers.
Our summer up here in Canada is just getting under way. Looking forward to many happy nights in our Minilite this year.