I have a Weiss DAC that supports JPlay and briefly looked into a trial of it. The problem for me with JPlay is I have to use my iPhone as a controller. No thanks. I hate using the iPhone as a a remote or controller for anything.
I didn't even bother trying it out. I use Roon running on a an Intel NUC for the server and use my MacBook Air (and very occasionally iPad Pro 12.9) as a Roon controller.

