I was really pumped, until it came out.
I don't know why, it never clicked with me, and the rest of my group *hates* it. They love spaycraft though. they hate the modern fantasy theme that seems to roar through the whole text. When the gnoll pimp page was turned to, there was silence in the group, and then I heard books closing.
They also really hate the classes. As a GM I appreciate what the intention was, but as a player, they are just NOT exciting. They wanted to see classes like Soldier, Cat burglar, Hacker, PI, anything but what they found.
They have issues with D20M's method of autofire, but that is pretty common.
And no one was quite sure about the wealth system. The voters are still out.
The magic system was to close to DnD for them too.
We loved the allegiance system though, and even converted it to use in fantasy.
That said, the D20M is one of the least used books in my massive collection, used only for a short lived RIFTS conversion.
Razuur