I recently added an AC200 to my system ... I have only had it like this for a week and personally think there is a very small improvement in the SQ of all my sources, but it's not major and I may just have the rose-tinted view as it is new to me and I'm very pleased with it. However, it's definitely not worse so that's something.
This was intriguing... as I've been running a 210 straight into DSPs as my only source for almost a year, with my AC200 boxed up as it was no longer needed with just a single source. Previously 5200.2 (Hi Matthew!) and now 5200SEs.
So I added it back in to give 210>AC200>DSPs over the Christmas break... yup it's better. Not a long term opinion of course, but it was definitely better. I don't know why this might be the case. Pleasantly surprised!
...and then remembering that the AC200 can be 'upgraded' with a Prime PSU I did a quick search for opinions - didn't find any - but did find the units currently available brand new on clearance for £349. I don't know how this could improve things either but happy to try at this price...
Arrived today... better again, and I reckon a bigger improvement than just the AC200. Again very short term result, only been able to listen for an hour, but there you go. I'll experiment with them in and out of the system a bit more when they've settled in and my ears are accustomed to them. Removing often gives a useful perspective...
Also, I think my MQA pass through is working as my speakers still display MQA as they always did (running 3.16), assuming that is how they should be

Yup the AC200 is passing through the full MQA from the 210 to the DSPs. And with the AC200 I can now have the DSPs displaying 'Roon' as the source label rather than SLS.
S