We have been using Tuple for little over a month now. While it is still in beta they are making amazing strides in a short period of time to bring us the tool that we have been wanting for such a long long time.
I hurt my hands a few weeks ago so I've been pairing out of necessity and I can't believe that it took me this long (10+ years) to get on the pairing train.
Just got access tuple about a week ago. Worked really well, I plan on trying to remote pair a lot more for OSS issues in the future.
I had written an article about the missing tool in the pair programming market when Slack killed Screenhero and didn't fully support its features. The pickings were slim back then. (https://medium.com/codingzeal/a-guide-to-remote-pair-program...)
Here is a follow up article that I wrote about Tuple once we had put some time into using it along with an update or two. (https://medium.com/codingzeal/tuple-the-new-hero-of-pair-pro...)