The dress has arrived, and it fits! It also came with some extra stuff, like double-sided tape in case I need to make, um, adjustments?
I ordered with a coupon code, so the whole thing was $47 with shipping and insurance, which isn't too bad. I really wanted something new for this wedding, and I'm sure I could have bought something at TJMaxx for like $50 anyway, so renting is only worth it if you find something you love love love and can't afford, or maybe if you rent something that will be out of style in a month.
Here's the dress (shamelessly hotlinked):
I was hoping it wouldn't be as bright as the photo makes it look, and it isn't...though of course my ass looks a lot bigger than the model's.
(and btw, if anyone wants to sign up, I'd love to send you an invite so I can get more coupon codes :-) )