I've evaluated Netlify for my blog at https://jdsalaro.com and I'd advise against that unless you're missing a CMS on your static site generator. Other than that I personally felt it didn't bring much to the table. I do admit that their CMS is slick, but it wasn't really a feature I needed.

Of course I'm not sure what other people are using them for, but in my case GitLab/GitHub covered all my bases pretty well since I wasn't looking for a pelican/hugo CMS and you still host somewhere else (not Netlify).