This is a good, fast dish suitable for weeknights. I used whole-wheat bow-tie pasta. I wouldn't make any other changes. It was delicious.
We also didn't have luck with it. The taste was good- but it was gloppy-- not creamy or smooth. I kept reminding my husband of the low fat content, and he said that made up for the fact of the texture. It was like heated up left-over fettucini alfredo that had the fat break due to excess-prolonged heat.
I thought this was really good. I doubled the amount of sour cream & parmesan cheese so that there was more sauce. I also added some red chili flakes. I'll definitely be making this again!
Ended up being a little disappointing -- I was expecting the yogurt and cheese mixture to actually become a sauce, and instead it was a just a watery mess with specks yogurt and cheese mixed in. Despite that, it still tasted okay, although my husband felt it was missing something -- maybe some lemon.