It's a good deal, and I've posted links to it a couple of times in the last month or so.
The drawback is that it adds weight out there on the barrel and has some moment to it, and it snags stuff when walking through a lot of cover. But when you get where you are going, it is nice to have. The barrel harmonics it may impart and effect on pattern is something I want to evaluate further (whether the gun shoots a better pattern free hand or stick under the stock than with a v-pod clipped to the barrel and touching the ground).