Yes, as per my comment to badlogic, we are about to publish an in-depth guide for microphone solutions. So far, the ReSpeaker ($79, https://www.seeedstudio.com/ReSpeaker-Mic-Array-Far-field-w%...) seems to be the most promising, but the Micro Semi and MiniDSP are also good. The Matrix Creator has a lot of potential, but requires quite some tweaking to get good performance. We are eagerly waiting for their Matrix Voice to ship. We'll post our findings next week on https://labs.snips.ai.