I didn't expect to like this tail.  I only bought it because I lost my swimming tail and this was the only mermaid tail I could get one-day shipping from amazon.  Turns out that this tail is good.  For those of you that don't know how these work, mermaid tails are basically a pantyhose like fabric over a mono-fin (like snorkel fins but stuck together).  Since I mermaid as a physical activity, rather than as a model, I care if I can swim and how they perform in the water.  My normal tail (from 2 tails) has velcro that allows the monofin to be tightened and securely held in place.  It is firm and I've got a lot of control.  This fin has sock-like pouches for my feet.  The monofin is very bendy.  This makes this fin excellent for pretty mermaid activities.  The tail flip is always a struggle in water (you try throwing several pounds of water out of the way so you can flip your tail above water).  This tail is great at it!  The flexibility of the monofin gives some really good flip effects.

I used this fin in a high current and had a really good experience.  It works well for steering.  It isn't as good for speed or flat out swimming, but it does excellently as a hold-on-to-a-tube-and-steer tail.  The extra flexibility also means it was easier to shove in my luggage. I'm surprisingly pleased with this tail.  If you want to model or play dress up, this tail is superb.  If you want to swim, I'd look for a monofin that has velcro or other straps.

PS:  Mermaid's don't have scales.  (Think about it.)  I would have preferred a non-scale pattern, but that wasn't available in one-day shipping.  I guess this mammal has to deal with being a fish for a bit.