Aaah!! I'm so glad it arrived, I've only sent letters to Canada before and the lack of delivery confirmation was starting to stress me out. The wrinkles from me cramming everything into the smallest box possible should come out with one quick steam iron (you can put a thin piece of fabric or a presscloth over the embroidery just in case).
A couple quick notes about care (you probably already know all this): the material is cotton with cotton batting inside, and is prewashed so you should be able to machine wash it no problem (I'd probably wash it on delicate or warm...but I wash everything I own on that anyway). There's insul-bright in the potholders but I'm pretty sure that is also washable.
I'm glad you like it, I had so much fun making them! The potholders are adapted from a Martha Stewart pattern for heart-shaped potholders, I found I really like the way they stay on your hands. I also discovered by accident that if you drape the apron over a chair it looks pretty amusing: