The Jokeri by Prodiscus is an overstable putter that most people will use strictly as an approach disc. It may be a little shallower than your average putter such as an Aviar or Luna, but feels deeper in hand than your average approach disc like the Zone or Tactic. It's edge profile is also a lot more rounded shoulder like you'd see out of a putter, and it has a nice flat top that makes it comfortable in backhand as well as forehand (if you're comfortable forehanding putters).
Because of that it falls into this sweet spot where you can put a lot of power behind it and it'll fly in that middle ground between an overstable putter and a beefy approach disc. It definitely won't flip up and turn over on you but its not going to just dump into the ground, it will fade steadily and smoothly till it finds the ground. I'll say I find that this disc seems to have a little more ground action than I was expecting if thrown in premium plastics, but that can be solved by just getting it in the grippier base plastics if that's something you're looking for.
If you're looking for a disc to fill the slot just beneath your very stable approach disc for a wind fighting short range disc but don't want to beat the living daylight out of a Zone to get there than this may be exactly what you're looking for. It's reliable, feels great, looks awesome, and is used by some top pros including Drew Gibson (watch him throw it on the last tee shot of the Las Vegas Challenge to take the W).