I have mine for 3 years.
I have the Plush top bed and I got a W feather bed (looks like a blanket) with it. This allows the bed to go soft if I want by putting the featherbed on top of the Plush top bed. I also got the box spring and rails.
No noticible depression on where I sleep - I sleep on the side of the bed. I also like to sit on the side of the bed and use a laptop.
I do notice small amounts of thread on the Plush top starts to untangle - but likely wear and tear.
1 or 2 feathers pokes out of the featherbed once a while - maybe also sign of wear and tear. Overall, quite satisfied with my bed.
I wonder how long can a bed last? 10? 15 years?