Typos are a feature of many new texts and since they have consistantly corrected as new additions are produced, I'm not concerned about that issue. The content of Unit E is difficult for the students. Electricity and Magnetism has always been a difficult topic for the students, so I expect some trouble every year no matter what text we use.
Some specific difficulties are with electric potential terminology.
We constantly had to clarify whether we were talking about voltage or potential energy. In addition, many of our students plan to major in physics, biology or chemistry. However, by ignoring the term potential, they might get confused in future courses. The only other major difficulty was with the field equations. The flow of the material in the current form is MUCH better than previous editions.