Easy to use, has built-in caching - we didn't need to write or maintain custom cache code for our integration with it. There was no documentation about how all of this fit together yet you could easily do some experimenting when using their trial version if there were issues. They did publish an official document though once it launched that got released which helped us along. The support is amazing! The entire team is extremely polite and responsive. We used them as a partner so they provided technical guidance and implementation help but also just answered questions I had related in general. Definitely looking forward to building out more integrations. Currently what we're doing - pulling data from external sources (Salesforce) and storing in a local database, querying against that. I like that it's easy to use, has good documentation (even though there is not much), works great in both Chrome & Firefox as well as mobile devices! It doesn't have many features yet but they are coming along nicely. The price tag for this product isn't bad either so we'll see what comes next from them with their roadmap. We've been using sheetsontools to create our own APIs which allows us to easily build custom applications without having to rely on an external provider or 3rd party app/service.