Should say this and be fair with PS Audio stuff

In my earlier post I have expressed some scepticism on class D, in general, and 
PS audio  gear, in particular. PS Audio Stellar S300 was my first class D amp
(I was accustomed with tube gear) and I paired it with PS Audio Stellar Gain Cell
pre. I have them in my third audio system which I do not use often. Although the performance
of Stellar S300 has initially impressed me given its price, in combination with the Gain Cell pre,
the overall sound did not seem to me impressive. Compared to my tube gear, 
it was a bit harsh and bright.  But this initial impression turned out to be too crude. 
Each time I return to that system, it sounds better. I guess it took more than 1000
hours to reach this level of reproduction, which is still getting better.
My confusion was also cased the DAC incorporated into the pre, which, for
my taste is far below the quality of the pre and the power amp. I use the pre only with an
external DAC (Reimyo DAP 777). The amp drives nicely Thiel CS3.7s and
I love the overall sound, open, alive, enough clean with tight base and nice mid-hight
frequencies. Nothing to complain about (a rare occasion when likely, I feel satisfied). 
It is not a top level equipment I have ever heard (with the cost of several times more)
but it is something that i really like and am satisfied with.   
And, it is also fair to mention about the service in PS audio, fast attentive responses and actions.