Any experiences with FM Acoustics Preamps

I am interested to know whether FM Acoustics preamps - though technically specs perfect & meticulously executed have 'that emotional thing' we audiophiles look for? Or is it on the cool side.

Response from Forum members will be most appreciated. I'm considering the single-ended FM-155 to go along with the Symphonic-Line Kraft amp. Symphonic-Line recommends their RG3 MK4 as a perfect SS match or even their tube preamp Enlightment as a match. Nevertheless, FM Acoustics interests me but am not aware how it sounds & whether the integration will be perfect.