Well, I bought the 27" swivel model and mounted it on my AR.
Here are my thoughts, pros and cons
Pros..
It is very well made.
It does provide a stable rest.
It is convenient.
You won't accidentally leave it behind.
Cons...
It does add a cumbersome feel to the rifle when carrying.
The legs are set at a fixed height and distance apart. It limits you as far as where you set up. I did not think about this until I used it in the field. With shooting sticks I can adjust for height, very uneven ground, move one leg to avoid an obstacle, etc. The fixed legs on the bipod do not offer that flexibility.
You cannot swivel the rifle very far left/right to track a moving animal, or to scan in low light, you will have to reposition the bipod.
To sum up the cons in a simple statement, I found that I had to adjust to the bipod, not adjust the bipod to me, if that makes any sense.
After 3 hunts with the mounted bipod, I removed it and went back to shooting sticks. They're just more user friendly, IMO, than the bipod for hunting.