My sister-in-law received her birthday gift so I can post about it now.
I made the Hip Mama Diaper Bag. The exterior is Loulouthi and the lining is Parisville laminate. This was my first time sewing with laminated cotton, and it really wasn't too bad.
The tutorial was very clear. I think if I were to do it again, i'd made the strap longer so it could be worn cross-body. There's a lot going on with this bag with the fasteners and the zipper and velcro and elastic so it's fairly time consuming but not difficult to sew. I'm pretty sure I left the opening in the top of the bag and topstitched it closed instead of leaving a section of the lining unsewed. i'm not sure why most patterns don't call for this--it seems much easier to me. or it's possible that i just hate hand-stitching that much. i ran out of craft-fuse interfacing so for the bottom i basted in a layer of cotton batting instead. The bag came out pretty sturdy so i would definitely use a heavy interfacing again.
because it takes so long and there are so many pieces, i'm not sure i'd be signing up to make another one anytime soon. but it's a nice bag and by leaving out the elastic and laminated interior it'd be a nice all-purpose bag too.