I was inspired to dig deeper into the setting after watching the Disney John Carter movie, and found the setting much more deep and impressive with the original novels: A Princess of Mars, The Gods of Mars, The Warlord of Mars, etc. It is an endearing pulpy science fiction romance story with rich abundance of lore and gives players many options to pursue that lie in similar veins of more tradition fantasy RPG's.

The system [2D20] is marginally simplified compared to other 2D20 systems, even compared to systems like Dishonored or Star Trek, which has its benefits but also has its drawbacks. It does make it simpler to pick up and play, with character creation generally taking about an hour if a player knows what they want to build and going through the steps to make that happen. The rules are also fairly easy to explain, take two attributes add them together for the target number and the lesser value of the two attributes being the focus value giving you one success for the former and two success for the latter if the player rolls under it. The talent and core weapons are fairly open to interpretation and free to player creation giving them unique combinations they can utilize to specialize their characters and make them more notable for certain aspects.

The reviews from these players may be paraphrased for readability.

• Kormak: The 2D20 concept is great, and the setting is awesome. I do wish there was more of a feeling of character advancement. (He further concludes his view is somewhat inline with Thurg's based on Thurg's comparison to the Conan system). With bringing in a more Conan like system, this would require a good amount of homebrewing to maintain diversity while keeping enough structure to feel character progression was there without hindering the overall freedom of the player, it opens up that other can of worms; balance.

• Mikado: I adore the setting, and from one who enjoys story dice, I feel this adheres close enough to that that it allows you to embrace the role play of it rather than feel like I am playing a board game. Don't get me wrong, I enjoy the board game like feel of some RPG's, but I find that often the super crunchy systems (in reference to very structured games like Conan, D&D 3.5/4e, Pathfinder, or Shadowrun) have a tendency to distract from the role play aspect.

• Oda: The setting itself is wonderfully schlock sci-fi that feels very Conan the Barbarian on Mars. In a realm where civilization slowly seems to be degrading and the locals have all become sky pirates, warriors and kings, it feels very energetic. It's been a lot of fun to run amok, and I appreciate how it's very possible to do silly things with enough leeway to not get yourself killed immediately. As for the system, it seems pretty lucid. I'm almost certain I made some poor character choices when building things up but I think that's more on me than anything. The custom dice certainly help. Still not quite sure how spending renown works, but again I'm sure that's on me. It looks more intimidating than it really is.

• Thurg: I prefer the more crunchy Conan 2D20 system over the super rules lite JCoM myself. Personal preference aside though I do like the setting though I was familiar with it before we started and as someone familiar with the ins and outs of the world I wish we were seeing more of the politics and intrigue of the setting (From the GM, this is a personal misstep and not necessarily one from the game).
  The JCoM version of the system especially with personal instead of group momentum and luck that is more easily regained than other 2D20 equivalents really does make the game feel almost too forgiving. I for instance have yet to spend a single point of experience on anything so far and it really hasn't felt noticeable that I haven't bought anything yet with that exp pool. Heck I forget about half his abilities like his species ability to generate extra momentum in combat and I still don't feel like I am under performing. It works for the super campy pulpy setting of JCoM mostly but I still wish there was a little more to it.