Paolo,
I purchased the MM phono card for my B135 SST2 in 2016. I originally was using a Rega P25 with an Exact 2 MM cartridge, and more recently I've been using a Yamaha GT-2000 with a Denon DL-110 HOMC. Both require a little higher volume setting than with other sources. I find it as engaging as the Manley tube MM phono stage I have, albeit with lower noise. I haven't done comparisons to other stages, and really don't have an intention to at this point.
I hope this helps.
Marty