When using the mod, getting a level up results very often in negative xp towards the next level up. When you have negative xp and read a skill book, the next xp gain you get makes you lose the buff from the book, resulting in wasting the book. Also, after reaching lvl 10 and getting even 1xp results in a "level up", which gets super annoying really quickly. You keep getting a level up after every hit for example or a patch you put on clothing. All of this resulted in me not using this mod, despite loving it so much.