I found the range extension part of this device to be very sufficient, it certainly seems to do that part well. The speed does suffer a bit though, I found probably a 50% reduction in speed compared to a direct (wifi) connection to the router on my 100/40 FTTP NBN connection.
Would be fine if it's just so the internet doesn't keep dropping out in the bed room like we wanted it for, if it's going to be used for more serious applications you might want to spring for the high end 1200AC model.
Say goodbye to WiFi dead zones! The Coredy E300 Universal WiFi Range Extender is designed to conveniently extend the coverage and improve the signal strength of an existing wireless network and eliminate dead zones. Small size with better performance and wider coverage! Compact wall-plug design, works with any standard router or gateway. High Performance External Antennas Two external antennas for better performance. Reliable wireless N network speed up to 300Mbps covering your bedroom, floors, Restroom, garage, garden and other wifi dead sports. Easy Installation & Relocation Easily expand wireless coverage at a push of the Coredy E300’s WPS button and your router’s WPS button. Or, browser-based configuration, accessible from almost any device, including iOS and Android mobile platforms (if your router do not have a WPS button). The smart LED signal indicator provides a simple and clear indication, helps you find the best location. Connect Wired Devices While boosting your existing Wi-Fi coverage, the two Ethernet ports can also connect any wired device such as a smart TV, multimedia player, game console or PC to your WiFi network, works as a media bridge. Create a New WiFi Network Anywhere In Access Point (AP) mode, it can be connected to any wired LAN to create a new Wi-Fi Access point, allowing the internet connection to be accessed from laptops, tablets, phones or other Wi-Fi devices. (For example, a hotel’s internet connection) Convenient and Flexible 3-in-1 Repeater, Access Point and Router, Coredy E300 range extender brings Wi-Fi as the way you need it with its three selectable work modes. What’s in the box 1 x Coredy E300 Extender 1 x User Manual 1 x Reset Pin 1 x RJ45 Cable