I was excited about these shelves, but the "Dark Walnut" color that arrived is far from dark. It perfectly matches the color pictured on the product page, but I assumed that the product page pictures were a mistake as the pictures show walnut, not DARK walnut. So we ended up returning the BAOBAB shelves and instead purchased BAMFOX shelves which really were the dark color we wanted (at a significantly lower price).
Given that we immediately returned the BAOBAB shelves, we did not have an opportunity to try mounting them. That said, they have the same mounting system as the BAMFOX. Consequently, I can tell you that you should avoid any wall anchors that do not grip the wall from both sides. I highly recommend at least getting 3/8" pop toggles (and making sure to pop them open after inserting them). This will ensure that your shelves do not droop and can carry a significant amount of weight. Another option is to use molly bolts. Whatever you do, do not use simple wall inserts (which is what BAMFOX distributes with their shelves) as they will pull out slightly (or possibly completely) and lead to drooping (or falling).