I grew in the mud mix for a couple of years, they do real well, if you're careful about the waterings. Problem for me was, all the repotting. Mud mixes don't last long they break down within 6+ months. They shed water then shrink and compact the roots. I loved the root growth I got from mud but just couldn't do all the transplanting (which I hate with passion)
So they mixes can work, but like anything there are pro's & cons.
Just curious ....What was you're choice of new media?