Okay, I now have about ten dives on these, in the pool and in OW.
You can do all the kicks with them. In fact, I think I have a more powerful back kick with these than with my other fins (Jets and DiveRite EXPs).
You can move forward like a house afire.
They feel weird -- they are VERY long fins. They are neutral, so one must get used to the balance.
They are absolutely contraindicated for any application that involves line. They are designed as horrendous line traps.
In OW, with students, they are fantastically visible, very versatile, and permit precise maneuvering as well as fast swimming. I will use them with students. I don't think I'd ever get to the point where they would be my fins of choice for my own, fun diving.