I recently got a PT100 and love the sound. It's substantially different from my Yamaha cxa5000 that it's replacing. Then again, the PT 100 is geared to stereo listening and the cxa5000 to home theater. One thing that is lacking in the PT100 in a "direct" button or menu selection to bypass all tone controls and remove electrical noise. Maybe it's not necessary but I got used to having it and when I listen to most cd's they usually sound better direct (to me)and not modified by tone control circuitry. I also have trouble reading the display from about 8 feet away and put it on it's brightest setting but it really didn't help. Outside of that, for what it is, I think it's a wonderful piece of equipment. It works and produces beautiful sound.
I'm happy with mine as well. I was waiting to purchase much later but decided to get it at the last scratch and dent sale. It's coupled with a Kenwwod M2A amp (220 watts per channel).
I don't hear a significant difference between it and the Kenwood C2 preamp it replaced.. But the more up to date inputs are what I love.. USB, Coaxial, and optical inputs. The C2 preamps were excellent preamps.. So maybe it's why I can't hear a very audible difference.
I stream quite a bit from my laptop via USB cable and it enables me take full benefit of lossless audio through Tidal as well as Tidal's MQA selections.
I'm also planning to buy the bluetooth dongle later on.