Eternals is a weird film that I don't dislike or really love. It has too many half baked plot points due to the large cast of characters. The Eternals themselves are interesting enough, but not all the cast get to shine. The special effects are not going to blow anyone away. In fact the main enemies (The Deviants) are very generic. They remind me of something that you'd see in Avatar, not an MCU Film.
This movie is worth seeing at least once if you're already a fan if the Marvel Universe. If you aren't into comics or the MCU, it might not be your cup of tea. Also, it can drag in parts.