Its quite easy (but it helps if you clip the curved seams before! you turn it inside out).
This bag is made with my own Prism block print and lined with Flower Press RickRack fabric in aqua. I've put a little pocket in the blue which will fit my phone perfectly. And I've topsewn with a different colour to the bobbin (woohoo!)
This is not the last version I will make of this pattern, though I might just fiddle with it a bit now I know how its made.
I'm scraping in late for my creative space, so go check out the organised people here.