My first course in linear algebra was extremely formal with very little practical examples or visual intuition. It’s easy not to appreciate just how much intuition can go a long way in helping us understand a concept, even if the intuition is formally “fuzzy”. I used Hefferon’s Linear Algebra to plug the gaps in my intuitive and practical knowledge, and was all the better for it.

People have different reasons and approaches for learning, and in the linear algebra landscape Hefferon is a worthy addition.

(edit: just like one of the commenters below I bought the hard copy a few years ago to show my support and thanks for the free edition.)