The Freya gets criticism simply for being too inexpensive (and a wide range of other opinions it seems, none I've found that really relate to my experience with it, except bright LEDs), and as I’ve never heard one of the well regarded Sachs preamps I can’t comment on them...but I can say I’ve really enjoyed my Freya (bought last December) with NOS Sylvania 6SN7GTB "Chrome Domes" and was thinking recently that the 128 step attenuator is something I’ve really come to appreciate...I use this thing with a 12WPC SEP amp and 99db efficient speakers so any hum or tone issue would jump in my face, and none do. A great preamp by any standard.