I have one. I love it. You can have it linked to Kaleidescape and have movie posters play through it. Personally, I use a website called
CineMaterial - #1 Movie Poster Database. It has rare high-quality posters you can download and link to your digital movie board. For example, I don't like all the white Bond posters. On the website, I downloaded all the original bond posters and use those. Great Tarantino posters and getting your favorite movie poster used in foreign countries. I think it's around $ 20 for 500 poster downloads. Don't quote me, but it's really low.
The downside I found is when I add new posters, for some reason, it won't upload all the time, and I have to call customer support. The good news is that their customer support is very responsive and always resolves the issue during the call.
You can also personalize the banner with your name or even get an AMC or Alamo Drafthouse banner. Lots of options, and it can play trailers within your poster. I prefer the standard version without the trailer dialogue playing. My daughter is having a slumber party and using the board to create her own posters for the party.
So yes, I'm a fan, even with the occasional hiccups.