Looking at their website I wasn’t sure about the thickness being offered - it looked like a straight 3mm all over for the S4. If that’s correct, then in terms of diving I’m thinking it’ll only be good for relatively warm water. They certainly look comfortable, but different people have different tolerances and therefore requirements depending on the water temperature, so it may be suitable for you from that perspective. The other thing I noticed is that it looks like a performance wetsuit in terms of low water resistance etc., and I’m not sure if it’s worth paying for such features, considering that any advantage you may get in that regard is more than compensated for by the drag created by all of the equipment you’ll be wearing while scuba diving.
Anyone else want to chime in?