Pros
For a part time internship, you work remotely, so hours are super flexible, and the pay is pretty good for this level and type of work.
Cons
Not too much cons about it. The work they give is good for the most part. One con is perhaps the lack of interaction with upper level management in this startup of <10 full time employees. One would think that interns could interact and learn from founders and executives, but for the most part interns have a point of contact with a more junior guy.