Koetsu cartridges - myth or reality?

Hi guys - I am looking to upgrade my 1 year old Dynavector xx1 MC cartridge - I have heard (and read) for many years that Koetsu cartridges are a great option for those looking for musicality, right timbre and lush-sounding analog.

Digging further I find that some cathegorize them as slow sounding, not great tracking and poor price/performance ratio as well... I am looking for advise from those who have experience with Koetsu - particulary those who moved from a fast sounding cartrdige like Dyna, Clearaudio or Lyra - missing anything once you moved?

Thanks

Fernando