Hello, welcome to CIN!
Our college uses the CompTIA materials for Network+, after transitioning from the Cengage books that we used for many years. Personally, I think we're having greater success with the way that CompTIA's books are written, because of the supplemental activities that are woven in. We have always had issues where the lab manuals were either not well play-tested, or they didn't align to the text book that well (some labs that seemed 'forced', just to have something to put in there for a chapter.
There are two challenges that we have always had with these courses. First, how do we present the material - do we go domain-by-domain, where we effectively skip around all over the book, or chapter-by-chapter where we go all over the domain map? Domain allows us to better create assessments that follow large swathes of the testable material, Chapter is easier to present, but harder to assess along the same thread as the Net+ cert exam. So, there never was a really elegant or clean solution here. Most go for the chapter model; I looked at doing it by domains and it would have been extremely chaotic.
I personally think using CompTIA's materials as your main source would be better than offering them as supplementary.
HTH,
/r