Is Cross Fit enough?

I've been going to cross fit 2-3 times a week when I'm in California for work. However, I'm still mentally struggling to accept that cross fit is enough to count as my sole workout for the day. I am an admitted cardio and sweat junkie. I like to get in a good solid hour of cardio a day and be dripping with sweat at the end. So after a cross fit workout that is primarily strength, I sometimes feel like it isn't enough. In the hour workout, I feel like I'm only working really hard for 10-20 minutes. While I have always enjoyed being active, my primary reason for working out is to burn calories. So I am left asking myself is cross fit enough? No doubt it is helping my all around fitness by encouraging more dynamic movement and strength, but does it burn the same number of calories or am I better off sticking with running or a spin class?