I've seen it recommended on MN quite a lot, so thought I'd have a look the other day. I did 30DS (well kind-of - I wasn't committed to daily, I was maybe managing 3-4 sessions a week, and managed 3 sessions of L3 before I just got a bit bored, even though I think it's brilliant).
I see a PT weekly, doing mainly weights and HIIT in his gym. I'm not a massive fan of cardio, although have been a regular runner in the past (I just get frustrated with it - I seem to really struggle to improve, and it leaves me with self-loathing that I can't see any improvement). I LOVE weights, but can't really get to a gym regularly, so Fitness Blender has been brilliant to do some stuff at home.
Mentioned it to my PT this week, and he'd never heard of it, so he's going to have a look - it'll be interesting to hear his thoughts, but comparing it to what I do with him, there's lots of crossover. I also like that they actually get out of breath and huff and puff!
So, favourite work outs? It's very early days for me, but I'd like to try to do 20-30 mins of exercise every day (for me that's much more manageable than trying to run 3 times a week).