In my opinion, it really comes down to the style of learning that is suitable for each student. In my airline, until recently we have had face to face instruction for all type courses.
We just introduced Airbus for the first time with the A330 and along with it came the CBT. The opinions were extremely varied. The main objections came from the older guys who weren't comfortable with being taught by a laptop and the youngest guys who needed everything explained as it was their first type course.
The guys in the middle (comfortable with computers and experienced on other types) who just needed to learn the systems were relatively happy. I suppose they, like me, have had instructors who simply don't know their stuff and lead the class astray. At least the computer will give the correct information. Our training facility (for some stupid reason) regularly allocates an Airframe Instructor to several of the subjects on an Avionics course. You should see some of these guys try to drive a schematic! It's not their fault. They are thrown in the deep end but because they are the instructors, they feel that they have to Bullsh#t their way through it. Some interesting arguments have resulted!