I do love Best Press, but wanted to try the recipe due to cost, (even though I only buy BP when on great sale, or have a coupon) I thought it worked pretty good, but didn't have the "finish" feal that BP gives.
I don't let it partially dry, but I do spray a "pile" of fabric - holding each piece up - spray - rotate to dry area - spray, then just let it rest on the ironing board as I proceed to the next piece of fabric. By the time I'm done spraying all the fabric I intend to iron it seems as if the BP has soaked into the fabric enough to migrate to areas I didn't spray so well, and I start ironing! It definitely helps get those hard wrinkles out. Cutting fabric is much nicer with the slight stiffness it gives, and doing hand stitched Hexies is definitely much easier too!