Yes I’ve used Ripple. I ran an ad in a Coffee Bean and Tea Leaf in the Los Angeles area. It was surprisingly really easy to set-up…you can do it all via their website at AdCenter. The cool thing was you can plug in your zip code and up pops a map with live sites, that helped me choose the CBTL I wanted to run my ad in. I’m a personal shopper/consultant/designer and there are a lot of women that frequent that coffee shop so it made sense for me. I ran a months long campain, my ad showed up for 15 seconds every 10 minutes (the loop in that location is 10 minutes long)…so about 80 airings a day…for the price (less than $400) for the month, it was literally about $0.05 per airing which when comparing to traditional media…it’s a steal!! I’d recommend it! It’s a heck of a lot easier to track too because it’s such a controlled environment…meaning…you can display the exact message you want, at a specific location, at the exact moment in time, reaching a chosen demographic. Good luck.