Review is for Eternal Bullet
Bottom Line Up Front: Great hand feel, slightly OS, durable, and super consistent.
The Bullet is a great mold. It is moderate depth, but comes off the hand clean. It feels good to hold. The plastic has good grip for a champ-zy style plastic. I use a power grip when I drive with putters (just a preference), and have no issue doing so with this mold.
The flight is overstable, but its still a speed 2-3, so if you wanted to overpower it you could. I throw it for approach shots, and for some 2-300 foot drives. I love it for neutral or tailwind shots, but wouldn't use it for a headwind.
The Eternal plastic is very durable. I'm deployed to Qatar right now, and the ground is covered in sharp, flakey rocks. It has held up as well as or better than all of the other plastics I have here. Holds up better than Z-line, about the same as Champion/C-line, and it is the same plastic that Axiom/MVP/Streamline uses. It's wide open here, and I am able to use is for a lot of shots. I even got a 331 ft ace with it a few weeks ago. It was on a tailwind, and the thing just coasted right to the chains.
Above all this disc is super consistent for my use. Its one of those discs, that I have much less doubt in how it will throw. It just does what I want it to most of the time, and I'm not even that great.
Eternal Bullets would be a solid choice to learn on.
To me it feels pretty similar to an Alpaca/P2/Firefly, Luna/Roach, or Lat64 Mercy (Mercy has more glide) type mold though not exactly the same. I've converted quite a few people over to them from more expensive driving putters from other brands. They just fly great, and are readily available at around 15 bucks. I'm not sticking a $100 Sky God or Luna in a my bag when these do just as well for msrp.
Is the Bullet a revolutionary mold? Maybe not. Is it as good or arguably better than most driving putters that are much more expensive (factoring in resell market)? Absolutely. Buy multiples for the price of one of the others and get down on some field work. You'll absolutely play better in minis and tourneys.
Side note: If you haven't thrown Mint, they're very specific about runs. They have every disc marked with what mold run, plastic, and year it is. They track closely the unique flight properties of each run. This should be an industry standard; its so useful. So, when they do another run of a disc you love, it may not have the same properties, but you will be easily able to find this out due to the way they pride themselves in cataloging their product. The Mint fan base are a tight knit community, but they aren't elitists. They're actually very inclusive and want to spread the word like they're disc golf's equivalent to the gideons. I've seen charts, I think made by one of the main people at Mint, breaking down discs for run and plastic down to the characteristics of the color (reused from my SB Bobcat review).