Its definitely worth the time investment. World building is amazing, very wide variety of character perspectives and motivations. I'll admit, I've never actually finished the series either. I made it to book 8 twice before falling off because you're right, ten massive books is a lot. I do have book 8 on order now, going to start from there this time.

Also if you or anyone reading this comment likes black metal check out Caladan Brood. The project is named after a Malazan character and all the songs on their single album are rooted in various plots from the series.