Well, as a musical nightmare - can't sing, no sense of rhythm, tone deaf - I struggled with the Stepping Stones podcast as couldn't find the beat (or on the odd occasion I found it I quickly lost it again), so did it once, then left it alone. So I was a bit sceptical about giving Stamina a go. Tried it this morning though (as have swanky new headphones from Father Christmas) and was pleasantly surprised - not only could I hear the beat I could keep up with it!
So to anyone who didn't get on with Stepping Stones and hasn't tried Stamina yet, give it a whirl and see what you think.