Bubbles shoes sizing and are they comfy?

I’m buying the bubbles shoes in 35, im a US size 5 and 22cm. A lot of people in the subreddit recommended sizing up but a seller swears it’ll fit a size 5.

I heard from the forum it’s less comfortable than a dml or majoretty shoes, is it true? I prefer sleek designs and any other recommendation will be helpful!

And as someone who isn’t very used to heels- how uncomfortable will it be? (⨂_⨂)