I used the generic brand for a year. They were OK. Then I used my wife's CA Halter, Lead, and Stick and they are wayyyyy better.
The Halter is a nice stiff rope (easy to put on) with 5 nose knots instead of 3 or none that most rope halters have.
The lead rope is weighted and moves and flexes smoothly without tangling.
The stick and string are used together and individually for a variety of exercises. They are the right length and combination for following the CA method.
You don't have to use his stuff but it is sooo much easier.
I use wal-mart brand tools on my car. A mechanic uses snap-on tools.
They both work, but his fit better, last longer, and are more ergonomic to use.
If you could do one lesson with a set of CA tools you wouldn't be able to get your wallet out fast enough.