The best thing about nsone was that they were able give me an API key so I could integrate it into my website without having them set up anything for us! They also have some really great guides/tutorials out there which helped get things running smoothly right from day one.
We've been using their managed solution since early 2018, but we're still in trial mode now - not sure if this will be extended or just remain as planned at least until Q3 of 2019 (we'll know by then). This has made our setup process much smoother than doing everything ourselves before hand; all you need do once your site goes live after being integrated via api keys / xml files etc., is add rules when required which takes seconds rather than days like trying to figure stuff yourself would normally take time.