I did for a few months.  It caught on about as popular as a root canal is.  Physical printed flyers still work the best out here.

We did QR codes on sign riders years back, I know some love them but we didn't get a lot of traction . . . on my signs they all say 'call/text' [my cell] and I use RealBird to respond with a single property website for the property inquiry . . . 
Even now, I get semi-annoyed with 'scan the QR code for the information' just give me the damn website! LOL

This sounds so archaic.  There are so many other solutions to this besides a QR code.  Easiest one is to just use the address & usually google pulls it right up. Most agents add too much non-essential stuff & buyers can't find the house.

Fascinating & useful question Marie Avery-Withers thank you. Let's see

I now only use QR on my Yard Signs and Open House signs. Other than that I create a QR for new construction neighborhoods that lead people to my site showing all houses for sale within that neighborhood and I place those nearest builders sign - LOL...

I am not.  

I used the RealBird code on my Riders about 10 years ago.

Nope, because I have an app that has "map homes" on it that I can text a link to buyers that shows them everything in the MLS ... so they are in front of house with a sign, open the app and there is the price, specs and interior photos. It's a button that says Instaview and it's instant.

Years ago we did but it really wasn't well used.  Haven't done so since.

Have a digital lawn sign out front the office that works super! The web address is on all the signs and that link gets you full access to videos, blog posts, a slew of current fresh listings and more Marie Avery-Withers !

KW Command offers us the opportunity to put these on all of our marketing materials.

I am sure it would not be hard to print it on a sticker and attach it to our signs too.

no and I hate qr codes.  During early covid several local restaurants put "paper" qr codes on the table.  So definitely NOT better than the plastic menus that could be sanitized.  Just give me the site.

Usually no, but sometimes since I can generate the code for free. Honestly, I do not believe they are used much even it is extremely easy to use since our phones are so awesome ,  yet 99% of visitors find the property online via Z. or R ~ via my personal survey . 

Clueless, parked and reading. Did I mention retired? Does not sound like QR codes ever caught on in real estate.

KW Command offers us the opportunity to put these on all of our marketing materials.

I am sure it would not be hard to print it on a sticker and attach it to our signs too.

Hi Marie! I did use that for a couple of years when the 'gold rush' was on but, didn't get anything from it. It was one of the first things I tweaked when I noticed not ROI after another year. I can't remember the company I used but, we tested and tested it and our inquiries went through - people just click through on Z and other sites - not from the sign any more.

Hope this helps!