I have owari satsuma and kishu mandarin. Neither has fruited as of yet, but, maybe one day they will give me fruit and I will be blown away and not need the Changsha.
I have never seen the Changsha hybrids for sale out here, or, I would have probably purchased them. With the citrus quarantine in AZ, we don't normally get a ton of interesting varieties, like FL or Cali.