Yes, of course I downloaded it. To my credit, I only played one mission before going to bed instead of staying up until some ungodly hour.
They very kindly give you one of the new characters as a gift when you download the expansion, and I scored the Krogan Warlord. It's the first Krogan character I have had the chance to play. I must say that I rather like him. He's designed to perform well without any worries about "cooldown" times on "powers". His powers are all things that you can start and then forget, as they're all armor enhancements or weapon enhancements.
He's quite the brute in play, too. I equipped him with a nasty shotgun, but I hardly ever use it, preferring to smash things with a power hammer. He's also a brick when it comes to durability: the game I played was against the Collectors, and it took a Praetorian to get him down. He was going toe-to-toe with Scions and winning (on the low difficulty setting, Bronze, of course). Quite a change from the other characters I've played: he's very much a "run up and smash it in the face" sort of character.