The one thing I would also add to this, as well as any other CompTIA (or certification course for that matter) is to remove, from jumpstreet, the expectation that a candidate is going to be "cert-ready" at the conclusion of the training. The human mind requires multiple exposures to the same information in order to properly process and assimilate the knowledge.
I personally am not a fan of boot-camps for 'first-time' candidates unless they are particularly astute. Personally, I think the only good thing about boot camps is their ability to pull in money from potentially desperate candidates, but that's just me.
At IntelliTec, we teach Net+ over six weeks with 20 hours per week of seat time. Yes, that's three times the amount of time as others above have recommended, and this is to the recommended audience of people who have been through the A+ material. Perhaps it's our clientele, but even after that, I tell a candidate to continue studying for six weeks longer, for an hour a night, to be certification ready.
Network+ is particularly high in the amount of memorization, which really works best if you relate the information.
As
@Gregory Childers will attest, there are so many people who are interested in a quick fix solution, just to get the certification so they can position for a job, chasing the money. These kinds of people I would not be enthusiastic about having in my classroom.