The "voice"/style of the writing has a great balance between giving theoretical information and keeping it comprehensible without having to read like 5 times (which most algebra texts imo really botch!).
Most algebra concepts (in the linear/modern/abstract sense) have an intuitive/mental-model foundation, often graphical. It's disappointing that most texts don't explore the intuition in a friendly way like this text does. (The theory is deeper than the intuition and intuition can be very wrong at times, but anyone studying advanced-ish math like this is capable of realizing that!)
One annoyance is that the graphs don't render if they're slightly off-screen (and they render slowly/fade-in or something) so it can be somewhat annoying to scroll back/forth between graphic examples.