Honestly, there’s almost nothing bad with the RT-AX53U. On the contrary, it’s a pretty great router with features that greatly enhance its use. If you have the latest phones and devices, you can take advantage of the stability offered by the WiFi 6 or 802.11ax. For features, I really found the AiProtection to be a real and practical boon as it automatically shields devices connected to your network from shady websites.