Ok let's be upfront, this set is really all about the unique minifigs. 5 figures in a $20 set. That's pure playability all by itself.

we get;

Kai - the red Ninja on a rescue/jailbreak mission. He is the newer print and comes with the new one shoulder pauldron.

Prison stripes Zane - the Titanium Ninja in jail. A delightful fig.

Giant Stone Warrior - in prison stripes. This is the first member of the Stone Army that the ninjas face. Originally awoken in the History Museum. Now in prison and a reluctant ally. He is glorious in his 4 armed white and grey form.

Prison stripes Captain Soto - Ugh! We finally get a Captain Soto fig. First Captain of the Destiny's Bounty from back when it was a pirate ship, and it's the prison uniform instead of his normal pirate gear. Oh well he's still great to have. ( you can actually make a full TV Captain Soto by combining parts of this fig with the torso and parts from the CMF Pirate Captain figure)

Jail Guard - more civilians are always good. He seems a friendly sort.

The Build and Main Model is acceptable. A nice little scene with a cell, a visiting room, a dropping gate and a launching table with bread. It forms a nice backdrop, and it's elements can be used to flesh out a larger Ninjago display. It also works well with any Super Heroes set.

Overall it's a nice set at a great price. The minifigs are pretty much unique. Lots of play value and collectability.

Unique parts

This set has some cool parts, like 2 telephone hands or 2 prison doors and few slick plates 6x1.

Surprises, moving stuff

There is a cool main gate that can slide down, triggered by part of the roof. Right and left prison cells (floors) can move. And 2 more I will not elaborate as one should see by themselves. Very playable.

5 minifigs

Should I tell more? Just the minifigs are worth the price alone, and one gets extra bricks ;-)

I highly recommend!

This is a nice set with lots of play features and minifigures.

The Minifigures included are:

Skybound Kai, a common but still nice to get

Prison outfit Zane, a nice overall figure

Prison giant stone warrior, a great 4-armed figure

Prison Soto, would have liked to get regular Soto, but this is good enough

Prison guard, a civilian most don't really care about but is still a nice figure

This set was disappointing to most people as they wanted a bigger, better kryptarium prison to display, but I think this is a good playset as it has lots of minifigures and play features e.g. a door that can be broken open, a toilet that can be used to escape, a bread launching table and an exit gate/ cage for giant stone warrior

Overall would recommend this to kids and collectors who don't mind that it is more of a playset than a display piece, good minifigure pack and nice playset

This set was one of my first ever LEGO Ninjago sets, so I do have fond memories of it. However, looking back, it's not one of the sets that I think aged well in my collection. It's not a bad set by any means, but the build does feel pretty lacklustre even for only $20. Of course, this is because the main appeal of this set is that there are five minifigures, three of them with exclusive parts. Personally though, I am more of a build collector over a figure collector, even though I love collecting both. In my opinion, future Ninjago sets do the minifigure pack concept a lot better. If this set had great minifigures, I might have been okay with the mediocre build, but the only exclusive I really like is the prison version of Zane, who is a really cool variant. The stone army warrior and Captain Soto are good, I just don't care for their prison outfits all that much. Once again, these minifigures don't really make up for the mediocre build in my opinion. Kryptarium Prsion is a cool location in the show and I'm glad this set is different from the usual vehicle, but I feel like the build just doesn't have much going on at all. It is fun for play, but the rest feels hollow. Despite the uninteresting build, I still do give this set a pass for the decent minifigures (the quanity is still great for $20) and the at least fun for play build, even if I'm not entirely satsified. It's fine for what it is, I just don't care for what it is.