The fins are good enough, I suppose. Although I feel they are grossly over-priced. I would have been very satisfied if I had payed $140 for them, but to me $200 is just way to much. For the price, i would kind of expect something like a mini dpv at the end of my fins or something... Although I do like being able to adjust the fins. Its a nice performance and astetic touch to the fins. Mut more so then anything, it really does just come down to performance and comfort.
Performance wise, they are relatively fast and convenient for catching up to your partner if you lag behind a little bit. It doesn't take to many kicks to get where you are going so it ads to the comfort factor that when your drifting under water you dont have to work too hard. You can put in a series of slow continuous kicks and then rest. Also, it appeared that the fins would kick up less sand compared to everybody else, though I could be dillusional, but if anybody noticed anything similar it'd be nice to know.
In regaurds to weaknesses, they are not the best fins for surface swimming, imo. I feel like they dont make as good as contact when your on the surface. So in currents you still end up working a lot. My ankles began to ache after about 15-20 minutes of free diving while I was trying to avoid reefs or have waves that could potentially slam me into the rocks (and sea urchins!). Although once I ducked or dove down into the water, the fins provided me with more then enough power to push myself away from trouble. It also takes slightly less effort to swim down into the water if you're wearing a boyant wetsuit with no weights. And in regaurds to frog kicks, i did not think they were that effective with these fins, though it could just require a modified technique....
Overall good fins. I would enjoy them a lot more if they were priced differently. Maybe you can pick them up in a couple of years after the price drops a bit. But for now Im sure you can find fins that are equally as good for less.
Also note I suspect some of my issues with the fins could go away as I use them more since Im still new to diving. Although i've put in a decent numbers of hours free diving with them (about 14-16 hours) with only about 80 minutes of use in an OWD and and maybe 4 - 5 hours in all day pool diving instruction. But I guess i will report any noticable changes through out my uses.