I use the lined inserts for my uni notes and its such a great quality and thickness to write notes on.
I bought a bunch of A4 and A5 inserts a while ago to make two notebooks for my nursing study notes. They are amazing quality, so I can use every pen, texta or highlighter and it won't leak to the other side. Just waiting for a restock so I can get some more!
I like the thickness of these lined paper. Easy to write on.