I am trying the Tena Slip Maxi right now for the first time. I have the version with the breathable sides, and I'm wearing a size medium. I have a 34" waist, so the bottom adhesive tapes don't reach all the way to the plastic shell, rather I had to place them on the breathable side panels. I'm sure that they will start to loosen around the legs because of that, but I'll have to see!
Different diapers fit differently due to the cut, padding, and tape placement. I also feel that the NorthShore Supreme fit best for me, they only ever leak if I know that I'm pushing the boundary. ABU's diapers always leak around the leg way before their limit whether I'm standing, sitting, or laying down. They just don't fit me. I've heard others say that their bottom tapes are rather high, and it could be that I have the same issue as them.