I like to be open to new ideas but this is just a monopod resting on a belt, using a trendy "-fy" name. I can make my own with the monopod I already have and a belt I already have in a few seconds.
Furthermore, it's a snapshot stabilizer. For real professional wildlife photography, more often than not, you want to be close to the ground.
And for video, since it doesn't remove the up and down movements caused by our feet (it's more likely to make them worse), it's nothing more than a monopod here either.
The advantage of using a standard monopod as a walking stick would probably outweigh having a shorter one hanging from your hip.