This is my go-to site for streaming animation. They offer a great selection of current and dated cartoons and anime and even some animated films. A select few of the more popular shows have been pulled, but those that remain are often available through multiple sources/players. Videos are checked frequently (they've also recently implemented a video/player quality user-feedback feature) and are replaced promptly when broken.
As other reviewers have mentioned, this site can be a bear to navigate without ad-blocking software, and the ads can be a bit racy, though they seem to have become more age-appropriate in recent months. With ad-blocking software active the site is smooth and responsive, and most (but not all) videos play on iOS devices.
Bottom line: This is a completely free streaming site that is reliable and does not try to trick you into clicking ads. Kudos to the curator!