Summary: Larger than you would expect. Does not come with software to play blu ray disc. it costs an additional $60 to $80 dollars to download software. Only found that out after contacting ASUS directly. This got two stars only because it shipped fast, arrived early, and plays regular dvd's using the software already on my laptop.
Excerpt: Writing speed was great for blue ray but it didn't work at all for regular DVD and it sometimes caused computer to crash when I tried burning DVD (but never had problems with blue ray burning). I'm not sure if the product was defective (other people writing reviews didn't seem to have any problems) or it simply didn't work well with my computer.