The short Cressi I had now tried for the first time on vacation.
For snorkeling hands me the output, clear - it is not comparable with the long flippers but still noticeable. The Packpaß is compact, the fins act meticulously crafted and stiff enough for good output.
What I did not like so much is the closure of the Achilles tendon. Although I have lashed him properly, I had snorkeling after a certain time feel that the closure / belt slips down towards the heel and slipping danger. So I had now and then nachzurren times and readjust.
Nevertheless, for me a good compromise to their own fins dabeizuhaben.