Just wanted to "chime" in and provide my two cents

After switching to the 890L some time ago, I initially set it up like mystify (controlling all three wifi radios and using three unique SSID's). I really didn't like the idea of using SC. I do remember having some issues where my NEST thermostats would "disconnect" from wifi periodically. I even remember not being able to get them to "connect" back up to the 890L 2.4Ghz radio. I had to reset the router in order for the Nest Thermostats to "connect" to the 2.4Ghz radio on the 890L.
After the latest firmware release, I decided "what the hell, I'm going to give SC a try". Not only was it very simple to setup (less work assigning devices to specific wifi radios), all my issues seen previously with the 2.4GHz radio and my Nest Thermostats did not happen.
Now, when it comes devices connected both wired and wirelessly, i think I have most people beat! I have at any given time between 18 and 25 devices connected to the 890 L (wired / wireless). In all, I have almost 40 devices that COULD be connected. (iMac / 2 MacBooks / 4 iPhones / 2 iPads / 1 iPad Mini / 2 Apple TV's / 2 Xbox One gaming consoles / 2 Xbox 360 gaming consoles / 2 Nest Thermostats / 2 DirecTV boxes / 3 DirecTV Mini Genies / HP Printer / Phillips Hue / Chamberlain Garage Door / Harmony Smart Control / Withings Scale / 3 Smart TV's). I've missed a few devices, but I think you get my point. SC handles these without any issues! I have no plans of going back to "manually" managing each specific wifi radio.
I too was a bit skeptical switching to SC, and one of the reasons was I didn't want to have to go to each device and change the SSID (it is a lot of work with all the devices I have in my home network). In all reality, it wasn't a huge issue and now, after switching to SC, I don't have to worry about three different SSID's and only having one SSID makes things less complicated all around.
If I may offer one suggestion, it would be to reset the router to factory default and set it up using SC. You will have just one SSID to worry about and the router will handle everything else! it does a great job handling all of my devices connected to 890L. If anyone has put this router to the test, I think I would be at the front of the line. The 890L is the most solid performing router I've ever owned. I've tried a lot of other routers (both D'Llink and other manufactures). Nothing has performed better for me than the 890L. I almost gave up on D'Link after the horrid DGL-5500 experiences

. I'm glad I didn't. Give SC a try - I'll bet you'll be glad you did and see your 2.4Ghz issues go away.
Anyway, just my two cents

BTW - anyone got two cents I can borrow???
