The Rose 150 audio streamer is a pretty new product ( at least here in the UK ) so the chances if anyone trying the combination already is pretty slim especially as the Rose 150 does nothing that any of the dCS products with hetwork streaming do not do already aside from video processing ( where one assumes that its HDMI connectivity would be used to provide MCH). It is also a DAC so , again, use with dCS is unlikely. Incidentally you can choose between versions with either ESS or AK DAC processors.
Aside from its functional duplication vis-à-vis dCS, there are also issues with using its AES/EBU output with dCS. Firstly it has no dual AES/EBU output so that the processing of some hi-res files will not be available with this combination. Secondly there is no wordclock input which means that Rose 150 and any dCS product cannot work in synchronisation. In this case it may be preferable to use the Rose’s USB connection as the dCS USB input is asynchronous.
The Rose 150 did get a very enthusiastic review in HI-Fi News a couple of months ago and seems a good product. But as a streamer/DAC it is really a product designed to be used as a stand alone device to play a variety of media sources and to drive an amplifier directly. Rose envisage this themselves in the typical system setup graphic on their website.