As a long-time user of Tena Slips, I was disappointed when they first switched away from plastic and happy when the replacement 'Original' hybrids were supplemented with the proper plastic-backed Active Fit line. The traditional Slip was a hard act to follow so my expectations of the Active Fit were biased by that experience. In fact, the Maxi measures up quite well as mentioned above. It has no outstanding features, nor any serious drawbacks, by comparison with any other decent medical brand. I dabbled with them for a while, but these days I am much more interested in the more absorbent Ultima, which is one of my daily go-to nappies for undemanding situations.
My least favourite feature of the Maxi and Ultima is the low rise leakguards. There have been some fairly close calls with messy leaks so I now tend to avoid them when expecting a BM. If a booster pad is placed in the seat, there is very little room left for solid waste, so I don't tend to boost them in case things get messy. My general everyday nappy is the Betterdry, which has some of the best leakguards ever made for containing large BMs, so the comparison is again biased against the Slip. Overall, yes, I'd recommend the Active Fit, but favour the top-of-line Ultima.