I think the show is OK, but I'm listing some pros and cons:
Pros:
1. The show uses good animation.
2. The characters are a different species.
3. The older episodes have more style.
4. The show has scenes to laugh at, just like the episode "Artist Unknown", where SpongeBob says "Now, I shall give birth, to art!" and fails.
Cons:
1. The show takes up over 70% of Nickelodeon's schedule (besides the Nick Jr. and Nick At Nite blocks).
2. With the newer seasons, the show has lost some of its funny scenes and jokes.
3. In the newer seasons, the show has more disgusting scenes. An example of this is in one of the Season 12 episodes that aired on January 13, 2019, which includes a scene where SpongeBob drinks saliva from other people (male and female).