Great start for being free
What do you like best?
Well you can't complain much about a free and easy to use CMS. You can build an entire site with the JAM stack and be connected to Netlify CMS all for free. The platform is pretty easy to use and you have a lot of flexibility. It's an open source project, so there is great potential for improvements in the future.
What do you dislike?
It's very new, which means there is a lack of documentation to be found. Most people are extremely unfamiliar with it, so it's hard to pitch to clients. Setting up authentication for the admin is kind of confusing at time.
Recommendations to others considering the product:
Check out Stackbit if you're looking for a static site solution that works well out of the box. This is still a good option for anyone working on a smaller project. I wouldn't recommend this for a client and you should be paying for something at that point.
What problems are you solving with the product? What benefits have you realized?
Settings up a quick landing page that the marketing team can use.