Yes, the Grail is a very under-exposed amp. I have had the SE for two years having auditioned it at home for three months against two other similarly priced units (COVID prevented the dealer taking it back).
There are three Grails. SE is the middle one, perhaps a bit more towards the flagship than the base. It can run single ended or balanced. I run balanced from cartridge to power amp.
Grail has a good claim to be in the best sounding group of phono amps. It manages to combine a near clinical accuracy with a musical presentation, which is rare in phono amps; one usually has to favour one or the other - as others have stated, warm or lean.
I won't be replacing it.