Some lessons can jump in difficulty, leading to potential frustration.
Enables independent study, often described as highly intuitive. Assimil Spanish With Ease
Some dialogues are considered dry, stiff, or sometimes "bizarre". Some lessons can jump in difficulty, leading to
“I’ve shown this book to native speakers and they find some of it hard to follow and full of big words... The style is stiff and the dialogue formal.” Scribd Some lessons can jump in difficulty