Way too short to be meaningful, although it does lightly gloss over some truths. I agree with this statement
To retire in your younger years, you'll have to work for it in your much younger years. In order to retire young without an income of hundreds of thousands of dollars, you'll have to live below your means, not within your means--and it's not going to be fun.
except for the last bit. I LBMM all my life, and I had a lot of fun. I think tying overspending with fun pretty much wipes out the message they are trying to put across.