I'm currently working with it for a project atm, I can not recommend it, it's ORM is pretty bad, cutting corners wherever possible, but the worst thing about it is its documentation it is badly redacted and relies a lot on examples rather than laying out the possibilities of what you can do with a certain part of sails, issues also go unattended for a long while and there's not much of a community surrounding it.
Just my two cents, I would be happy to hear some success stories from it though.
I worked with sails about three years ago. It was a decent experience, but Sails 1.0 has been years underway and seems like a major rewrite of the whole thing. I don't really think a great many people use Sails anymore, and I don't think I would recommend it either.
I worked with node for 5 years and never came across anyone using sails. That might be a symptom of the node community but last I saw it still wasn’t very good.
https://sailsjs.com/