Unison Research Reference Pre & Mono blocks.

Have read a couple of very positive but brief reviews of this newish pre/mono block combination, but nothing in depth. Would appreciate comments from anyone who has had any listening experience with them. Many thanks.
Hello, I am a dealer expecting delivery of the Unison Research Pre and Mono blocks in approx 4 weeks. I have had te Absolute 845 before. I will be happy to give you my honest opinion in comparison to other reference products including Kondo Labs (Audio Note Japan) etc.

Jack Lawson, The Audio Salon, Scotland UK.