Delicious! Even my husband, king of unhealthy eating and won't touch green stuff normally, enjoyed it. I used the cottage cheese, too.
I did have like, way too much filling for 10 manicottis. I used the whole box of 14. I think I might've had more than 1 1/2 cups of chicken though - maybe more like 2 cups - as I didn't really measure.
Next time though, I think I'll use shells. It took forever to fill the manicotti. I did use my hands as it was just easier, and it went ok but was just time consuming.
I did add some italian seasoning and some pepper to the shell mix as I read a few of the comments that it was bland. I also used a roasted garlic and onion sauce.. mmm.
I'll make it again, but it wasn't fast enough to put together to make it frequently.