Good deal. I think there is a little bit of a learning curve on getting them to set up and to release again. In heavy current make sure and drop well up stream of where you want to set. Also make sure the boat is moving down river. This will help insure the point of the flukes are pointing down river and set properly.
Now if you get it set in real well the cleves needs to get pulled to the front of the anchor for easier release. This means getting the boat up river of the anchor point and pulling the rope to convince the clevis to slide to the front.
Once you get used to a water spike they are very easy to use.