Parasound Halo A23 Amp/P3 Halo Preamp

A non-audiophile very senior citizen friend is looking to put together a somewhat modest system, which I would help him set-up. I was thinking of reocmmending the generally well-reviewed balanced Parasound A23 and P3 components, especially because there is a 10 year warranty to the original owner. However, in exploring the Internet, I have found -- in greater numbers than I expected -- comments about the unreliability of these components, particularly the A23. Negative reports include excessive hum and hiss; products being dead on arrival new out of the box; and product failures after several months of operation. Any comments or shared experiences would be most helpful, since I want only the best for my elderly friend. Thank you.