For best network performance and coverage, the wireless set up is what we recommend for Milo. If you are currently content with your existing router performance, you're in an excellent position to take advantage of the wireless Milo set-up, which gives you maximum coverage.
If your router puts out slow speeds or less than you pay for, connecting Milo to it via Ethernet might be a better solution. This way, Milo is able to get the max speed from your ISP and use it throughout your home.