I find the program a vast improvement over prior Acrobat products for the Mac and enjoy using it.
One of the features that is very helpful relates to correcting recognized text. Basically, after you OCR a document that may be unclear, there may be errors. This feature allows you to go in and fix the errors. The find your tools feature allows you to type in the tool you are looking for and then select it. For example, if you can't remember that the Enhanced Scan tool is used to OCR a document, you can type OCR and the correct tool appears.
There is an additional cost for using the Adobe Cloud, but that function allows you to sync and mark up documents and view those changes on different devices. If you don't want to use that service, you can use Dropbox.
The ability to change theme to Dark Grey is just a small touch but very nice.
There are a series of videos at https://helpx.adobe.com/acrobat/tutorials.html#fundamentals where you can learn more about the app.
This app does a lot of things with a PDF that Apple's preview does not do. For example, Bates numbering documents or redacting text from a PDF before providing it to another person is a very useful feature in the legal community.
In some ways this app may seem like a semi truck to get you around the neighborhood. However, when you work with PDFs all the time and need to encrypt them, mark them up, OCR them, share them, comment on and review them, etc., it is an incredibly powerful tool. You do pay for it but, like any tools that help you with your work, there is a cost benefit to it.
For me, it is indispensable and worth the effort of getting to know it.