I looked at some of the courses and they seem to be pretty good.
I'm not sure what your end goal is. Are you looking for a specific job, or are you just looking to increase your own knowledge for a personal challenge?
If you are looking for work, I can tell you that these sorts of certifications are useful, but don't put too much into a one source until you know what the employer is looking for. I've done a lot of hiring over the years in the telecommunications field. I've seen people with loads of certifications that looked impressive on a resume, but they lacked the "real world" skills or the ability to effectively talk about their knowledge in a mixed environment. I always caution others to not just focus on certifications, as on their own they don't mean as much as the certification body wants you to think.
Some of the best techs I've hired are the ones that came in with minimal knowledge. Some of the techs that come in with a yard long list of Cisco certifications have been some of the worst.
Truth is, there is no replacement for real world, hands on knowledge. Seems like you probably got that from the Army, so you may be in really good shape. Adding a few certifications to your Army skills might really pay off well.
As for the courses on that page, the generic, non-vendor specific ones might be best, unless you were specifically applying for a job that required training on a specific manufacturer system.
Also, web based training can be a mix from an employer point of view. While it's usually good and useful, in the classroom training carries a bit more "cred" in my book. But maybe I'm getting a bit outdated on this stuff.