Spiral have been my recent go-to for water resistant commuting bags.
I walk and cycle to work and I was looking for a bag to keep electronics and personals dry in bad weather. I bought a bag from Spiral and haven't been dissapointed. It's held up to daily use very well and is mostly very well made. (minor stitching imperfections). I particularly like the zip sizes and quality, which are great for this price point. I recently bought a larger bag and it's messenger bag companion as part of their offer and I'm very happy with both.