Is Comprehensive formulas for the CFA® Level I Exam worth it?

Yeah I’m going to disagree with formula memorization not being useful for L1. It’s very very useful. It gets less useful the further you go and by L3 you’ll need way less formulas. That said conceptual understanding can almost always eliminate at least 1 of the 3 answers

In my opinion you would be “wasting” valuable time reading this. You can be more productive using your time to read the actual CFA Institute material. If you really “need” formulas to memorize – e.g. to boost your confidence or for fun – then I suggest Schweiser Formula Sheet for Level 1 – as it is only 5-6 pages long.
 
Truth be told though, I don’t think memorizing formulas will increase your chances by much – perhaps an extra mark or two, but out of 120, is it really worth it?

CFA exams are not like the typical University midterms/finals. Instead, they tend to focus more on curriculum understanding and less on formula plug-and-play. You’d be surprised to see how much more conceptual L1 questions can be. 

@SaraRibeiro 
We also have a comprehensive 11 page formula sheet that is included with our Adapt practice exam engine. Feedback from forum users here has been that its the best available. 
https://www.passedtense.com/CFA-Adapt-Exams
 
You are right on that having something to reference while you are going through the CFA material is helpful. Its also nice because its something you can easily reference regularly and even something to use as a refresher the morning of or between the sessions on exam day.

@SaraRibeiro I would suggest you stick to only a selected providers (preferably Schweser and CFAI) because L1 is pretty straightforward with the calculations and Schweser does a good job in compiling all important formulas at the end of every volume. Clearing L1 will feel like a breeze if you make sure that you are able to master the calculation part with these formulas.