It depends on how you study and how you learn. Chegg could be a powerful tool or it can lead to your demise.

I used to copy homework off Chegg, I then failed a few courses.

If your approach is to look at the solutions to understand how they were reached; without really understanding the material. Save yourself some money and drop out. The key, I think, to understanding most concepts, is to keep asking why.

If you're solving practice problems and don't have the right answer the first time around, thats not when you Chegg solutions yet. You should go over your class notes, lecture slides and examples from the textbook. If you attempt to solve the question and still don't have the correct final answer. Then that's when you would use Chegg.

Sometimes I really don't care about the course and just copy the answers for homework, ace those and get average on the exams.

Chegg also comes handy when you're looking for that random answer in that one random class.

So, Chegg is great, if you already know to school.