I am living in with my daughter for the time being but, I had a Tetrad suite with loose covers( which went into the washing machine as they are cream) for 12 years, it was feather filled, it held its shape, there was no movement in the frame, I would buy another suite from this same manufaurer. I hope it is still in one piece when it comes out of storage.
Also have a good leather suite (cant remember make), which I have had for about 6yrs, and was also very pleased with that too.
But out of the two I would go with the Tetrad. 