Audio Research HD220

Hello to everyone, I'm very curious about this power amp from AR but never listened it.
May I know the nature of this hybrid amp from AR admirers that listened it in comparison to the full tube reference series?
Thanks in advance!
Deja vu
Here's a review from an Australian dealer-
Lustformusic, thanks for your suggestion!
I have read the entire review but if there is someone that can help me explaning the nature of the sound od the AR HD 220 it's better!