Alright, so it isn't Childs who's teaching this course this summer. It's this prof named Sarr.

Anyone know if he/she's any good?

Sarr is listed as a postdoc in the Department of Math & Stats. He seems to be a new prof, as his profile only lists that he has only ever taught one other course (at Mac anyway) which was a fourth year Stats course. Unfortunately, the chances of people knowing the quality of this prof appears to be low...