We do use the Tripod, and it does make a little difference. We have the fastjack, which can be locked to the pin, is fast to set up and folds up real small. We have the level up system, so not messing with the JT strong arms. We also have the Camco 57371 telescoping jack stands we can put under the frame.
Camco 57371 Olympian RV Telescopic Jack - 2 pack : Amazon.com : Automotive
I opted for these as they can accomodate the taller frame (30") where as the smaller camco aluminum ones have to be blocked up. The level up system, so we've seen will bleed down a little after extended periods, so if we're going to stay a while, we plan to level it the old fashion way, let the level up jacks just tag the ground, and put the jack stands under the frame. Since we've only had this fifth wheel since January 8th, we haven't got a LOT of time with it, but have set it up with the jack stands and tripod. Very stable. As mentioned in the above post, it'll still move some, but you can definitely minimize the movement a little.
If we weren't full timing, I wouldn't have any of the above. We never did before in our towables and the little movement we experienced didn't bother us. Now that we live in it, wife wanted it to be a little more stable, especially with our VERY active kids bouncing off the walls in the bunk room.