I heard these today at a dealer in Toronto. The source was Tidal via a DCS Bartok and unfortunately I did not have the time to compare to other cans.
My preference is for a fast, tonally correct, dynamic, but not lean presentation. Live music has a speed and density to it that is not easy to reproduce, but is my ongoing goal to achieve. Soundstaging is not that inportant to me, but what is there should be natural (not overly wide or narrow) with good placement of instruments and vocalists within the stage.
With that in mind, my impression of the Solitaire was of somewhat warm, polite can with a bit overemphasized bass, some kind of dip in the upper presence region and quite good, but depressed treble. The headphone did not lack detail, however information was presented in a laid back way that may not appeal to some. My sense was that the leading edges of some transients were a bit restricted and this combined with the bit of bloom in the bass bothered me. The soundstaging did not jump out at me, which probably means it did not lean too far in any one direction. The sound was not bad by any means. In fact the piano on Herbie Hancock's "River: The Joni Sessions' sounded fantastic. However Kamasi Washington's "The Epic" lacked the excitement I was expecting . At this price I just expected the whole presentation to be more balanced. In fact after hearing the Solitaire on the Bartok I did not feel compelled to even try it on the T+A headphone amp the dealer also had setup.
Please take my impressions lightly. I only listened for about 40 minutes, am not that great at describing this kind of stuff and am not claiming to have golden ears. Nevertheless
@xxx1313 's impressions are consistent with what I heard.
Would I pay the Canadian equivalent of the MSRP for these cans? For me the answer, would be a definite "No", however, I can see it appealing to some. Sometimes a different presentation can be quite attractive.
As always, I think listening for yourself is the best approach. If you enjoy the sound then the opinions of others are pretty meaningless.