Wanted to know if anyone here has purchased this course on LeetCode and was it worth the $90?
It's not worth it. The most valuable part is the mock FAANG engineer interviews, but you can find that for free on YouTube. Here's an example: https://www.youtube.com/watch?v=C9yRQd-oR-c
The free educational resource landscape has evolved exponentially in the past 10 years, especially for DSA as it's arguably software's hottest topic. There's no shortage of quality free resources to learn these concepts now - Check out this other thread: "What are the go-to resources for learning Data Structures & Algorithms?"
The only resource I recommend paying for is LeetCode Premium once you have at least 1 Big Tech interview teed up. For an example, you can watch my Meta interview story: How Alex Got Into Meta With 0 Prior LeetCode Experience
I'm not quite as negative as Alex. The main value of a course IMO is to provide structure around content. Almost all knowledge is available for free -- just check YouTube or Wikipedia.
The value of a course is (1) providing direction and (2) vetted instructors who are worth learning from.
So the way I'd evaluate the Leetcode course is by checking the structure presented and seeing if it jives with you. Also check reviews of the course if possible.