I'm so happy to see this posted. I've been at Facebook for two years, and Scuba is hands-down one of my most favorite internal tools we have (and we have a lot of good ones).

The article focuses a lot on the implementation, but thankfully you don't need to worry about that when using it. The flexible/quick/easy UI is what seals the deal for me, combined with the fast query times and realtime data -- you can use it to query things that happened literally seconds ago. On the React team we use it to collect all dev-time JS warnings from React that our engineers see so that we can easily track what the most high-firing messages are and how frequently they occur.

I haven't tried them extensively, but honeycomb.io and Interana are both Scuba-inspired products by ex-Facebookers. If this tool sounds at all interesting to you, I'd definitely look into using them.