After drooling over these bags for a year, I finally convinced myself to make one. I started with the large size. I really like it and may also make a small one.

Notes for next time:
A yard and half was not enough fabric
Pick out some premade bias tape that matches your fabric
Wide webbing will save the trouble of making handles
Extra stabilizer in the base might be a nice addition
Zip pocket zipper only needs to be 9" for large
Zip pocket lining might be a bit long
Interface both exterior and lining with 809
Fusible fleece on exterior