As I'm swimming for many years with fins and parted from the subcutaneous tissue at my last fin out of Egypt, the epidermis, were needed new. Delivery etc, everything quickly and well. Visible reasonable material and fine workmanship, Unfortunately, the size specification is not sufficient. I have narrow feet and wearing shoes size 42.5. The fins supplied with the Gr. 42/43 have too much air, dissolve under load from the foot, or give the feeling that they are going to lose! Therefore retour! I recommend to note likely to choose the smaller size because the optimum Kraftübertraguung only works for a secure fit of the fins. Who is not sure, should rather visit the local dealer, try on fins, thus saving the return costs.
Addendum of 06/12/2014: I can provide the size 40/41 and can only say it was the right decision! The fins sit tight without pressing. The propulsion in the water is awesome. Due to the length of fins you realize the leverage ratios significantly and soreness is certainly the first few times. So if you want to travel ambitious routes, will feel that. During leisurely snorkeling, however, one comes without much effort progressing well. So a clear recommendation for this fin and change to 5 stars !!