Have been using the Javelin lite bipod for three seasons and this is what I like and don't like.
The good: very light weight and quickly attaches; does not encumber the stock when packing or when using a Kolpin gun boot, it is surprisingly stable and no problem holding on a target.
The bad: DON'T FORGET IT; if you are not wearing cargo type pants with thigh pockets you will need to pack it or use their belt holder (dangles at your side and is hard to quickly remove); it folds together nicely but when open, the magnet that holds it open is not strong enough and it will close on you when setting up for a shot in rough terrain (by bumping it when shifting from side to side) and you have to reach out to open it again (hope they have fixed this since I purchased mine)
I really like the gunsmith adapter for mounting the bipod and most could install it if you have a drill press and epoxy. It it inset so nothing protrudes from the stock. You could easily attach a standard folding bipod over it.
With all things considered I much prefer this system on my hunting rifles vs an attached bipod, especially when packing longer distances.