From a design perspective, the Berg deserves its reputation as being one of the most unique disc molds, ever. It flies like no other disc, and is instantly recognizable in any game of blindfolded What's That Disc? It also splits player opinion like few other discs I can think of, with Berg Lovers vs Berg Haters being pretty evenly matched as far as I can make out.
And I was a Berg Hater for long, looong time. Upon first encounter I instinctively dismissed it as cheating the spirit of the game to be able to remove all skill from that crucial 100-foot upshot by throwing the Berg brick. Where was the touch? The flair? The sucking of fingertips to (mis)judge the wind? Nowhere to be seen. Instead, you could get any MA4 player to carelessly lob it like a sack of sand towards the basket for a bullseye, 9 times out of 10.
But then, there are only so many lost tag battles one can stand before that fearful phrase strikes deep into the soul: "If you cannot beat them, then join them!"
And yes, I can confirm those carefree lobs towards the basket land consistently in almost any wind condition, provided you don't show too much of the underside to the crosswind (it's still a plastic disc, not an ACTUAL brick!).
But in my defense, it is not simply a cheat code for idiots, there are lots of skillshots to you can pull off with it: forehand touch upshots that won't shoot past the basket because they stall on anhyzer, rollers that follow the angle you intentionally put it on all the way to the end, hard snap drives that will brute force its way into almost any headwind with minimal turn-and-burn risk.
Why K3 plastic? I wanted something I could actually putt baskets with and needed the clean release of a base plastic. I can confirm: it sticks the landing most satisfactorily. I also have the K1 and K1Soft versions, and may review those separately.
Caveats: It really is a unique hand feel. Forget about bead/no bead debates, the rim grips like the underside of a toilet bowl (flashing back to those student Friday Nights at the Union bar) which means some familiarisation will be required, and you might still hate it. The K3 plastic also will beat in to become slightly less stable than when new, if you can imagine an additional turn rating of -0.33 as making much of a difference. Also, prepared to be teased silly by the Berg Haters who still consider it a dirty trick devised by some Swedish golf supernerds.