Fun game, won't be purchasing the Jonin medal again. I'll go over a few reasons as to why.
1.) Increased Stamina: While anyone reading that in the list of benefits would probably jump for joy, don't be mislead. The increased stamina is useless because they don't actually refill the bar to full during each reset. Over the last couple of resets after running out of stamina, I get maybe half of my stamina bar back after reset if I'm lucky. Just in Fragment sweeps for my characters, I run through about 120 stam. If I'm paying to help keep the game alive with a sub, you can at the very least refill the stamina bar for those with medals.
2.) 200% character experience: While this sounds great in theory it doesn't actually provide any sort of real world benefit. I run three accounts and the account with the Jonin Medal that I used as my test account to see if I wanted to upgrade my others, gets stuck in the same choke points my F2P accounts do in the story. I go through all my daily missions and still get stuck in the same leveling choke points. So honestly the 200% experience is a joke.
The only thing the $35.00 Jonin medal accomplishes to do is provide you with some minor conveniences that to be quite honest you can do without altogether. The only actual thing of any sort of benefit it really provides is a slight increase to your power that could otherwise be obtained through other means.
So let's go over what you'll actually be getting for $35.00.
1.) 2 Star Nine Tails Naruto.
2.) Increased coins from Survival Trial.
3.) Increased reset count but if you don't have 50 ingots or coupons handy this doesn't actually matter.
4.) Ability to auto complete bounty missions.
5.) No CD for Ranked Battle or Rich Field.
6.) Instant sweeps on Ninja Exam.
7.) Laughable weekend rewards that actually don't make any real difference in the game itself.
Now, I'm sure a lot of you reading this are probably going to hate and that's fine to each their own opinion and this is indeed my OPINION. The very reason I got the Jonin Medal to test was simply for the increased stamina so I could play a bit longer and the increased experience to help me avoid at least some leveling choke points of "Okay you're 34 now make it to 36 and you can continue."
In short, for the TLDR version of this. Jonin Medals is a waste of money and you'll be better served sinking the money elsewhere. Honestly, if I could get my money back I would. The perceived benefits vs the actual benefits of having it is very underwhelming, to say the least. I'm not looking for something that's pay to win, but yet something that actually makes me feel like the money I gave up was actually worth it. I went from wanting to get three Jonin Medal's to now regretting I ever bought it. Fun game, just stay away from the medal system.