I didn't like at all the first of the series (Mistborn); never got into the other ones. It had some fresh ideas however the story was way too childish (in my humble opinion). Here's my review on that book https://www.goodreads.com/review/show/2031838874?book_show_a...
I completed the series a month back. I found 1st book to be a bit slow and need to force myself to read sometimes. But 2nd book thoroughly caught my imagination and I would say the best of the 3 books in the series.
Excellent series. I thought Sanderson's writing noticeably improved with each book, as well. Humbly suggest jumping into The Stormlight Archive next!
Good magic system, but I found the ending to be disappointing. Literal deus ex machina.
It's a fantasy series with an incredibly detailed, logical, well-thought-out magic system and world history.