I grabbed an iFi iDSD Signature for my office, its got some issues for sure, but it does have a nice sound. My outstanding issues are
#1) Stopped playing DSD 256, switch to my RME and no issues
#2) The Led indicator when DSD256 was working was either always CYAN which indicates DSD64/128 even when DSD 256 was playing, or it showed BLUE which indicates DSD256 even when 64/128 was playing.
I was totally crashing it before, playing an ALAC followed by DSD256 and poof, had to power cycle to get it to work again. But in following up on this I hot issue #1 above.
I did sanity tests with my RME ADI-2 Pro FS R and it has ZERO issues, using Colibri on an iMac Catalina. The RME is more detailed but what do you want from a piece of gear you can put in your pocket and use your phone as a source ;-)
Let see how their support handle it, with Covid you have to be a lot more patient as things are just gonna take longer.