I've had a site on the free tier for about a month now and have had zero issues. Page speed is great. It was easy to set up. I don't have a need for any of the paid features anytime soon and don't plan on upgrading. I've been recommending them to anyone who will listen.

It almost seems too good to be true but as other people have pointed out when its just static content their costs are so low. Since I don't use anything special on their platform, if anything ever happens migrating away should be a breeze too.