I only really know the original Earthdawn from FASA. Very cool system and a lot of fun, and also a fairly unique flavor. Not much like Shadowrun, tho, actually pretty much completely different. Some ideas, like the weapons, which gradually grow more powerful as you bind them to you, or the way magic works in general, are really great.
Some classes are a bit strange, like the thief, who cannot really do much in terms of roguish things, but all in all, they are pretty cool.
Not everything about it is good, tho... Earthdawn is extremely repetitive, the thematic concept is rather narrow, unlike fantasy worlds like Forgotten Realms. Of course, a crafty GM can make things interesting still and find new avenues for adventure, but the system doesn't make it easy, so to say.
Multiclassing is a joke (not sure, if anything has changed there). Multiclass characters are easily two times as powerful as single-class characters, because costs grow exponentially (while benefit is linear) and later, instead of raising a few talents from 7 to 8, for example, you could also learn a whole new class with a dozen or more talents from 0 to 7 for the same cost.
You really need a step-dice table printed on the character sheet.
All in all it definitely deserves a thumbs up.
Bye
Thanee