Both pannier bags arrived quickly and were very easy to install onto my bike frame. I've only been able to test the waterproof part from the inside because my extra water bottle I was carrying in it leaked. If water can't get out it surely can't get in.
The bag is large enough to carry my work computer and change of clothes. With the pair I can take my lunch now without worrying about dropping it too.
I look forward to many commutes using these bags on my Zebra.