I use this Apidura as well.
I got it because I wanted screw in and it’s thin while still being fairly large at 1L. I wanted a top tube bag on my gravel bike build instead of a handlebar bag because I wanted to access stuff like my phone or food on the move. I’m also small at 167cm using a 52cm frame. I had my first big ride with it earlier today. Because the frame is small, my knees can hit the bag while I’m out of the saddle but not enough to where I consider a hindrance. Otherwise, it performed great.