Here is a link to a Photobucket album I made for it:
http://s45.photobucket.com/user/sluggxp/library/Bad Concrete
^^ Pictures don't do it justice. It's worse than it looks like in the pics. It's kind of hard to portray it; I'm not much of a photographer.
Holy shit! I read the OP and was reading through the thread, thinking "anal retentive first world problems." That job was done by someone without the proper tools, and no knowledge on how to use what tools they did have. Absolutely unacceptable.
Possible repair solution: maybe put down a tiled surface, something like 12x12 tiles, put down in thinset. Generally before tiling, you want a level surface. I've put in a couple of tile floors; I think it's beyond my skills to get that floor fixed so that it looks good and the new floor surface is level (or rather, done with a proper slope for drainage.) But, I think it's possible, and that would be a hell of a lot less expensive than tearing the whole thing apart to replace the slab.
Then again, of course, who knows if the correct site prep was done before pouring the slab, etc. It *could* lead to potential problems down the road, or maybe it won't. It's a crap shoot.
But, if the actual contractor's work is good, and it's just a matter of the sub-contractor's work on the slab, then perhaps the contractor would be willing to do this sort of a repair for you. And, perhaps as a good gesture, you could offer to pay for the materials to make such a repair (particularly since it's an upgrade for the flooring surface) - and the contractor provide the labor to DO IT RIGHT. You can get tile that would do the job for about $1-2 per square foot at the box stores. (I'm not sure the stuff they sell is appropriate for that type of application; no clue.) Yeah, it really sucks donkey balls to have to bite the bullet and offer up a couple hundred extra, but that's probably the least stressful and most likely method to lead to a resolution.
The time and costs to go to court.. that's, of course, the other direction you can go - and if you plan on going that route, immediately dispute the AmEx.