As a person who tried out a lot of AI-s related to anime art generation, this one is either the best or close 2nd. Everything in it is free and there are a lot of built in features. Unlike it's competitors this site actually doesn't limit how much you can generate. You can change the quality to really high for free.
In short, upsides:
+ Completely free, easy to use
+ Lots of different, well made options to choose from
+ Never asks you to log in/sign up
+ Most of the best models included
+ Free resolution change
Downsides:
- Only 1 image at a time
- Can sometimes be rather slow (but usually predicts required time pretty well)
Overall quality is on par with some paid competitors, you should try it