I bought these shoes for my concert goings as I'm only 5 ft tall and often end up buying floor tickets. I used these recently at MSG for 5SOS, and I went with a 5'9 friend. Listen, I might've ordered the wrong side and had to stuff toilet paper into my shoes so I could walk and jump properly, but wow these absolutely helped with being able to see. They also are really stable, and all of the stumbles I had were mainly only because I was wearing the wrong size. Other than that, it's a good starter platform shoe in my opinion, just takes a few trial walks to get used to.
I usually wear a 5.5 for normal shoes but rounded up to a 6 for these. There's maybe an inch of space on my left foot, and on my right foot (which is slightly bigger) I'd say a little less than 2 cm. Even so, I think sizing down would've made it too tight. Hopefully, Demonia comes out with half sizing, as I truly believe this shoe is true to size (I just didn't have my sizing).
My only critique would be that the platform kind of scuffs easily. Also, even with socks on, the front of the shoe where your toes weren't the most comfortable (constant friction, but also might be because of incorrect sizing).