IPAD is only worth with PENCIL.
I bought it because I saw my CEO using it almost daily for one thing or other, I bought it with the same intention but didn't use much apart from YT , games and movies.
Then eventually gave up using it and shifted to a simple notebook and pen but as I started moving towards working more and learning new things, getting into more detailed oriented work I automatically switched to iPad.
The freedom it gives me to endlessly scribble until I understand the concept, it allows me to organize my hand written plans based on topics, it allows me to read research papers in bed and so on and so forth. I bought it for this reason exactly but it took me more than 1 year to really use it.
I only find 3 apple products useful: