The Javelin has a fair bit of play, in great part due to that attachment method.
I've used mine a fair bit (a few hundred rounds) and have a love/hate relationship with it. Pros: it's so light you'd never leave it behind; I tend to follow Jeff Cooper and Chris Way, in thinking that every rifle in the field can benefit from having a 'kickstand', and there are some shots where a dedicated bipod is the way to go.
On the other hand, the amount of play in mine means a measurable lack of precision compared to some other options. I think it's an okay compromise if you have some error budget (eg largish animals and shorter ranges).
However, I'm now experimenting with the Tier One Evolution Bipod - not the Tactical model, referenced above, but the heavier version which has the bipod apex over the barrel. Far more stable than the Javelin hunter options, and better for recoil management. Still fairly reasonable for weight for a field bipod, but it's not an ultralight.
At this stage, it's looking like the best compromise for something that can aid with recoil management, and assist with greater precision for longer shots.