Teaching Yoga to this Cerberus combat engineer is a hopeless task....
Ah well. At least, I've managed to unlock all the races I wanted to play, including my beloved Drell. ^.^ (Only downside is that he's carrying cluster grenades instead of the third more Vanguard-ish Wave power, but -- though you only get two of them per level -- they come in handy as well.)
The gameplay of all the classes is ridiculously (in a good way) different. First alien race to unlock for me was this one, an Asari Adept. Stasis + Widow = Easiest Rack of Headshots in Existence. Gameplay is slower and more strategic than the heavyweight Vanguard, but nice to switch to when you want to relax a bit and still rack up enough credits to buy a pack (or three) of goodies.
Also have a Quarian Engineer, leveled up well enough to be appropriately lethal, and a Salarian I've yet to play (and probably won't unless I get really, really bored with the others).
Anyone else have the demo?