30 day shred

No, it's meant to be done every other day although a lot of people do it every day. Personally I'm about to start a short round (8 days at each level instead of 10) tomorrow. I'm going to do 3 days a week, on my running off days.

I don't have any official numbers but I've started it several times in the past and every time I've felt results, even though I've never completed the full program.

I did this last year. Every day, 6 days a week but my brother did it every other day and still had amazing results.
For me it was the transition from sedentary to half an hour exercise every day (6 days a week) and it was brilliant! There were modifications for most of the moves, so they were adapted to every level of fitness, the workouts were fun - even if you ended up sweating like a pig.
In combination with a good diet (at a slight deficit) it can help you lose body fat and get more muscle strength. I only lost 2 kg - because I am quite slim anyway and my goal was not weight loss, but my brother lost 10 kg in 6 weeks - he obviously had more to lose than me.
Because it does not require any equipment and it is only half an hour, it could be something that you can continue for long term.
Good luck and I'm hoping to see your success story here on MFP!