We liked it...definately beats meat, veggie, and mac as a side. And it goes all in one pan...so easy to clean up, too.
I used chicken broth instead of plain water...I also doubled the mac so it would stretch to our family of six. I mixed the sour cream and cheese powder together in a small bowl so that it would blend in better.
My only recommendation is to put the broccoli in a few minutes AFTER the mac. It got a little TOO done. Oh, and finely chop the onions!