I halfed the pasta. It was perfect.
It was good, but the whole time I was making it I was thinking it wasn't enough pesto for a pound of pasta. Once I mixed it all together - it was not. I made a second batch of pesto, but by that time I had discarded the left over pasta water - if I'd had another 1/2 cup of water it would have been perfect. So all in all. Good. But double the pesto, or half the pasta.