A good multi-room mesh Wi-Fi system fixes dead zones and handles every connected device in the house for years to come. You want to buy this once and forget about it.
Tech gear follows a strict release cycle, meaning last year's model drops in price right when the newest version hits shelves. Wait for Prime Day or Black Friday to get the deepest cuts on hardware that performs just as well.
Remember that the intro window is a hard deadline, not free money, and any remaining balance at the end will get hit with standard interest.