You know, you've only gotten responses from people who hated it here. Ironically, you would've gotten a much better respose @ the Spider-Man forums ironically. It DID sell incredibly well, and did 'cause a lot of controversy. One of the things about it was that many people who don't go on forums really enjoyed it.
I'm a HUGE Mark Millar fan, and I absolutely relished his run on MKSM. I was a little let down by his Wolvie run, but hey, you can't win 'em all. Although it did have it's moments.
I bought every issue of his MKSM run and loved it. I bought issues for my comic reading and non comic reading friends. They ALL loved it. My girfriend at the time thought it was great and was asking me when the issues are coming out. Last Xmas I got the hadcover edition for myself and read it again.
Infact, Stan Lee wrote the intro to the hardcover and gave it a big thumbs up. He was even, (unsually,) honest at the start and said that he didn't feel like writing it. He then went on to say that he finished reading the book and loved it. Although cliched, it stuck to all the Stan Lee fundamentals that made the charachter. Mark Millar just updated it for this generation. Stan always liked to write somewhat cliched, and cheesy, so Millar kept it this way. Millar says this himself all the time
I say go buy the book. And if you still feel like you need other people opinions, go other places from here, the Spidey forums will help you a bit maybe, but truly speaking from one Millar fan to another, you'll love it. He started this after Wanted, so you'll see ideas from that trailing into this story
Don't forget, Millar's 1st Marvel story he read was The Death of Gwen Stacy. So he's always wanted to write Spider-Man since then, and knows a hell of a lot of his continuity and history, but doesn't get weighed down by it. It's a damn fun read to boot!