I had one of those PSUs and it was fine, was using for my Squeezebox and I found it improved the sound.
I only passed it on when sound improvements introduced by the 7520 negated the improvements the PSU made.
Swapped it for an NVA Digital coax and got even more improvement! :)
Opinions are varied on the use of a PSU for the Squeezebox, but there is no question about a better PSU for Stans Dac.
When I had this PSU it never failed, ran hot or any other problems.
Perhaps you had a bad 'un?

