The Insider Picks team writes about stuff we think you'll like. Business Insider has affiliate partnerships, so we get a share of the revenue from your purchase. TP-Link Slow Wi-Fi is unacceptable. The best solution is to set up a multi-router network, but it can cost several hundred dollars to create one. I recently tested the Deco mesh Wi-Fi system from TP-Link, a set of routers that's easy to set up, very reliable, and fast.