Should you even take them?
A good book I would recommend
Use this to accelerate your learning
and here's how to do it
Don't overcomplicate things
Too many people get stuck on this..
This might be ruining your Japanese
Your Japanese is different than my Japanese
Here's how he got good at Japanese
This is what you should be doing.
Immersion is not enough.
I don't understand why more people don't do this