I had a similar table like Joe posted for my Viking and one for the serge - I used it a lot, and after a bit the brackets holding the front leg started to bend and it ended up with a noticeable downward slope. So I bought a cheap icky one and traded the legs and got several more years out of it.
I would say not stable if you are bench rest shooting, but OK if you just want a shooting stand and aren't testing loads or something where you need to make sure the gun is not moving around on you.