If you are looking at the Allegro Diesel Fred made by Tiffin, Here
is an entire thread on the merits of that motor home. It's a very long thread, but you can get a drift of whether the owner was pleased or not with the coach. We have several members who have it and they all seem to be happy.
I have an Allegro Bus and have been very satisfied with ours.
Now if there is another "Fred" out there besides Tiffin, then hopefully someone will jump in and provide some information.