Weight / Fat loss

Depends on your goals. But for general fitness, assuming you're doing CV separately (cycling, running). Mat work is the best. Showing new customers the cool looking machines to impress them would have been more duff IMHO.

Remember the bigger and more complex looking the machine, the more it allows you to build major visible muscles without actually working stability muscles or tendons etc. So you get the look quickly, but not the physical benifit.

Good to know, ta. I specified my goals as building functional core stability and strength so that would make a lot of sense. The number of sets / reps seems a bit low, though - can I just increase them so it feels like I'm actually doing something slightly challenging or is there generally a reason for them being so low-intensity?