I just received one of these and am reasonably happy with it so far. I'm having some problems with the player recognising some tracks and some folders.
The sound is clean, with more treble emphasis, but better treble quality than my modded CD player. In my system, that is a good thing as I'm running 8 inch Fostex in an Azura horn, so the treble isn't as strong as it was before the horn.
Switching to a 12V SLA (altronics 7.2mAh), there is an added smoothness that has it surpass my CD player fpr overall quality.
I want to go I2S at some stage, but am waiting for an I2S to EIAJ converter to be available from DIY Paradise.
I also want to look at cap upgrades. I notice that Solen and Wima caps seemed to be used extensively in Mario's (MCB's) player. I will likely enquire in more detail about which components were being replaced. My board is revision 4.1, which appears to be different, so that could be interesting.
Simon