Above is the Denali website, if you haven't been there already. Denalis are built by Dutchmen, a part of Thor Industries. Past that, can't find any opinions on Denalis as they seem to be a new model.Thor makes many brands of trailer/fifthwheels/motorhomes.
Sorry that I can't help you more. Try Googling the following"
Denali trailer owners forums
Dutchmen trailer owners forums
Thor owners forums