I couldn't understand what timeline/time period they were at.

Well its like a tim burton movie, its pretty much outside of time in a timeless bubble. But I want to say modern times.

I do want to say 1940s but they have 1920s car

I think 1940s might be closer, there were mention of Nazi's and if you are correct about the car it would explain how they were able to get away with such a medieval medical treatment.

I really liked it. I heard some people saying it was bad, but I don't think it was bad at all.

I absolutely adored the costuming. The time period was hard to figure out, but I believe you are correct in saying it's sometime in the 1940s.

Rocket was quite possibly my favorite.

Costuming wise I enjoyed Sweetpea's in fantasy world costume. Dance wise, I liked the teachers. Her corsets were beautiful.

YESSSSSSSSSSSS

that is all. ^^