While the Open-mesh Om2p-ps 802.11n Pnp Wireless Mesh Mini-router you found looks like a good option, it may be more complex to set up than a dedicated mesh system. Based on your question about working in an "opn mesh", I would recommend the TP-link Deco M4 AC1200 Whole Home Mesh Wi-fi System for R1159 or the Syntech Cudy AC1200 Wi-fi Mesh Kit for R507. These are made specifically to function as whole-home mesh networks right out of the box, with easy setup and management through a single app. They allow you to start with one unit and seamlessly expand coverage simply by adding additional satellite nodes where you need them. Let me know if you have any other questions!
