the dvd is a multi format r/rw
the rest of the spec looks fine.
Advent is DSG's own brand (Currys / PCW), nothing wrong with that, but some people prefer a 'brand name'
personally, i look more at what is inside, than the badge on the outside!
the link should take you to the product guide on the Tech Guys website, but it might use session id
click here and then product guides / laptops /advent / 5xxx series etc