Without question I love the sound of the 3255 amp chip. To my ears it just sounds right. I have several Aiyima A07s one of the first small inexpensive amps with this chip. I Immediately enjoyed the sound and continue to do so. I have replaced two higher priced amps with these little guys (albeit in smaller secondary system).
I just order the new Fosi ZA3 which seems to take this cheap solution to the next level.
Are these amps something to ogle over build quality and audiophile jewelry? Heck no! Will they last ? Maybe not as long as others. But then again just buy another. So try one out you might be pleasantly surprised as I was (as I am still).