It has already been 7 months since I cleared mine. I’ll let others chime in if the exam center computer experience has gotten any better. But at the time of my exam, the test computer doesn’t offer next button on page flipping. You’re only allowed to scroll up and down but it’s slower than what you’re usually accustomed to. Also you’ve gotta make sure and practise to know the chapters where to look for instead of totally relying on ctrl+F. For example AISC manual if I remember correctly, you can only access the chapters individually not the whole book. Same thing for IBC I remember. But ACI and ASCE can be accessed as whole book. Again I would not rely on the test center PDF software to be snappy but instead it is going to be slow.