That said, my Express is flawless on 2.4GHz here (though my RF environment could be much different than yours.) When I first plugged it in, my 2.4GHz Wi-Fi was on channel 11 and Roku was reporting ~8-10Mbs. While that was sufficient for HD streaming, I figured I could do better, and after looking at the Wi-Fi that was in my home, I switched to channel 6 and my Express immediately started getting ~20-25Mbps. Your Wi-Fi environment may look different. If so, higher end models with 5GHz and upgraded radios or even the Ultra with Ethernet might be attractive.
I buy from retailers and just do replacements for stuff I don’t like. The last two things I wanted to return, the internet retailer just had me print a shipping label and leave it on my porch.
By the way, wireless reception is position dependent too and can really be impacted by being near other electronic devices and metal so sometimes moving it or rotating it can help too.
I have a Roku Express and often have fuzzy reception. I ran speed tests at the Roku device at the TV and got about 18mps. At the modem, about 30 feet away, through cement walls, I got about 30--32 mbs. Does this scenario--with the distance from the modem--sound like it is causing the poor reception? Does anyone know if a product upgrade would solve the problem and which Roku device I should upgrade to?