Monogatari

Hi to all!! I have recently came across the monogatari series and was wondering about the overall plot, if it's worth the time and from where I can start?!?? I keep seeing it in peoples recommend lists and that means it's must be good. Keep in mind I'm a big shounen guy that has seen most of the generic anime including Isekai and mecha shows but occasionally love a more deep and thought provoking story.