Hi
I would describe it as low carb, as you only have carbs (bagel/rice/quinoa) after you workout, so 5 meals out of 21 a week. Next to know sugar, I'm a sugar addict and coping well, I also take chromium picolinate, body coach doesn't tell you to take it, but I take one a day and swear by it.
It's very much low carb, high protein, high fat. No processed food. All simple healthy tasty stuff, all homemade. The most processed thing is a plain bagel. Lots of green veg too!
You need next to no room to workout in cycle 1, I go to the gym, as I am a member, plus I live in a flat so wouldn't want to annoy the neighbours whilst I am skipping, doing box jumps, burpees, press ups etc. have a look at TheBodyCoachTV to see his HIIT workouts, they're all on YouTube and you will see you can do them int he garden. I also use this tabata timer on my iPhone : itunes.apple.com/us/app/interval-fitness-timer/id395652793?mt=8
to help me with 45 second internal exercises. I do 145 seconds of say burpees, then 145 second of rest, repeat that 15 times! I mix the exercises up say, high knees & punches, basketball jump squats, burpee press ups, box jumps, skipping. All exercise will make sense when you watch his videos. I'm on cycle one and you can follow what people do on Instagram just search #90daysssplan
Hope that helps, happy to help with more questions...