Epson Hot Press Bright paper

I have tried a couple of Matt papers and I realy like the Epson Hot Press Bright. Everything was fine and dandy until I went to the store one day and the salesman said " your not selling these (prints) are you, because over time they will Cjange" He told me two things first the Brightning agents (bleach) would fade over time (how long no body knows because the papers are relatively new) and two that if mounted behind UV glass the print would look more like Hot Press Natural anyway.

So my question is does anyone have any longevity experience with hot press bright paper? What can you tell me? Thanks.