If its intention was to be a new D&D setting with an Egyptian veneer, it pulls that off quite nicely. Extensive liberties were taken with the history, geography, and culture of ancient Egypt to fit the standard D&D tropes (for instance, adding a coinage system where one really didn't exist and giving the regular races and classes new flavor to fit the setting).
But, if you're at all familiar with Egyptian history and mythology, you'll probably have to check your impulse to say "That's not right" on every page.

Because I'm very much familiar with AE, I'll probably do little more with Hamunaptra than cherry pick the bits I like and ignore the rest.
I'm not much of a crunch fan, so I really can't comment on the quality of the feats, spells, and such, but I'm guessing they serve their purpose.
As for the production values, the box is very nice, and the three books are good. Binding is nice. There's one table of contents in the first book that covers all three books, and no index to speak of (which is unfortunate). The interior artwork is all black and white, and ranges in quality from quite good to abysmal. What I've read of the writing is good, though I have noticed a handful of typos and editing errors. I have yet to find a page XX reference.
The 11X17 full color map is nice, though it's printed on one-side only and as mentioned above, takes some liberties with the geography and site locations of ancient Egypt.
So, all in all I'd give it a solid 7 out of 10. It's not what I really want in an ancient Egypt RPG setting, but I'm admittedly biased since I want more historical flavor and less fantasy.

I don't think you'll be wasting your money if you pick it up.