The latest models use Pascal Class D units and are excellent.
The collaboration with Danish Thomas Holm made outstanding sounding products.
I for myself had several preamps from Jeff Rowland in the last 20 years and now own a fantastic Daemon. Sonically it is fascinating, HP phono module, DAC, everything in a big nice box. You can use it as power amp or as preamp only, many ways to combine it with other gear. Or just use it as it is, a complete all-in-one solution.
Otherwise I listen to Kondo, Zanden, etc., so I really appreciate organic and natural sound, and Jeff Rowland delivers it as well in its way.