None! What helped a lot is finding out about these 2 apps on the forum: Goodnotes 4 and Liquidtext.
Goodnotes 4 works so well with the Apple Pencil to take notes and mark up PDF's; I use it every day.
And for studying PDF's I use Liquidtext, and that has helped a lot with my memorization.
The screen is surprisingly awesome (compared to my older iPads and my MacBook Air), and so are the speakers.
The performance is quick, and I just love reading web pages and PDF's on a big screen. Besides my phone, it has become my most used device, and I didn't expect that. No regrets at all, 1 month and 2 weeks in.
Goodnotes 4 works so well with the Apple Pencil to take notes and mark up PDF's; I use it every day.
And for studying PDF's I use Liquidtext, and that has helped a lot with my memorization.
The screen is surprisingly awesome (compared to my older iPads and my MacBook Air), and so are the speakers.
The performance is quick, and I just love reading web pages and PDF's on a big screen. Besides my phone, it has become my most used device, and I didn't expect that. No regrets at all, 1 month and 2 weeks in.