You are probably already spending money you had not planned to spend. So before you spend any here, read a whole module in full, in the same player you would be working in, and see the complete contents of everything else. Judge the rest by it.
This is not a summary or a teaser. It is one of the real modules, in the real player, with the real sidebar you would be navigating. We have not given you module one: this is one of the modules people pay for, so you can judge the rest by something that had to earn its place. The other are locked, and every one of them is written exactly like this.
Every module title and how long each one takes, so you know precisely what you would be buying before you spend anything.
The same words either way, so pick the shape you will actually use.