i currently am trialling the Altaira. it is connected to analog components (power supply for TT, RIAA, Integrated Amplifier and Step up Transformer). i installed it only last night. all of my system is from audio note.
i immediately noticed the SUT hum was gone entirely.
the noise level has been significantly lowered. so much so that i am still getting used to it. it makes some music sound better, it makes some music sound less flamboyant (i think because it removes some distortion which can be quite fetching in some contexts).
i found the accompanying literature very edifying (basic grounding concepts).
i don't imagine there would be too many people who wouldn't get something out of this. i do wonder if certain components are voiced such that with the grounding sorted we lose some of that voice/thickness. the detail is beyond the pale though. last night it was Silkworm's "Lifestyle" and for the first time ever i heard overtones on an electric guitar (similar to what i hear when i play in my home). so it seems to be allowing harmonic information to come thru that i do not normally get.
worth a shot is my advice. you might like it. it certainly does quite a bit in my system although i am as yet unsure as to whether or not i will buy it (slightly more to do with available funds than anything else though).