Japanese inspired half-square triangle quilt

I made this japanese-inspired quilt for my pal's 40th. You can make all sorts of great patterns with the half-square triangle, but I really like the simplicity of this design.

The coloured fabric is full of metalic gold prints, which are quite striking against the white cotton.

The quilting is pretty straight forward - I stitched the ditch in straight horizontal rows with no overlapping. The backing moved around something terrible and it took several attempts before I got something passable. I think I need to be using more pins- especially with such a large (therefore heavy) project.