I was using it from day 1 when I got the my iPhone 12 pro... I've always used the Presidio cases so of course had to continue. I honestly loved it. Not too bulky, protects the phone very well, has the raised edges on the outside and where the camera is case of any accidental drops, and felt good when holding it. I dropped it a few times, and had zero damage to the phone. And, to answer your question, I never had any damage to the frame from the inside being ridged.
The ONLY reason I switched recently was to take advantage of magsafe, so I ended up getting the otterbox symmetry+ with magsafe which I also like, however, if speck eventually makes a presidio case with magsafe, I would 100% switch back.
Plus their customer service is outstanding with replacements. I had normal wear and tear over time with other presidio cases, all you need to do is reach out to them, show them pictures of the issue, provide your mailing address and proof of purchase, and they would send a brand new replacement no questions asked.
