First impressions: The bra fits nicely and looks amazing. The size chart and color are both spot on, and it wasn't too loose or too tight. You could see quite a bit through it, but it obscured just enough to make things interesting. It's hard to see from the pictures, but the bra comes with a simple jewel between the cups that does a nice job of drawing attention to itself in good light. It also wore nicely under clothing without chafing or being uncomfortable. In addition, the fabric felt amazingly silkly smooth and was a treat to wear. The only possible downside is if you expect it to have any lift support. This isn't a major downside, since hopefully you won't be wearing it for too long.

Materials/Cleaning: The bra is made of nylon and spandex, which are both pretty straightforward to clean. It didn't come with any odor, and was reasonably resistant to getting dirty. To be on the safe side, I ran it through the washing machine on gentle with normal laundry detergent without bleach, and let it air dry. It held up nicely without tearing, shrinking, or sagging.

Packaging: The bra came on a hanger, and wrapped in plastic. It wasn't anything spectacular, but it could be useful if you wanted to hang it. I ended up throwing it away and just keeping it with the other bras, but I'm not sure any bra packaging would be worth keeping.

After testing: I still love it, and it's an amazing bra to wear for seduction. The clasp on the back is easy to remove, so you can use it as part of a striptease. It'd be nice if the matching underwear shown was available on EF, but hopefully that'll be out soon. I ended up taking off the jewel, since it wasn't that important and it ended up looking much nicer.

After a few months of wearing it once or twice a week, I still love it. It's held up amazingly, and still looks and feels great. It hasn't picked up any scents.