First of all, I love the plastic. It's very grippy and stiff, which kinda feels like the retro plastic. I just got it and have only made around 50 throws, so I'm not sure how it will beat in or how many tree smashes it'll survive.

The River in this plastic is noticably more understable than my other two Rivers. I have one in Opto which flies fairly straight with a small fade, I have one in Opto Ice Orbit which is overstable, almost like an Explorer.
This one however is so flippy that I have to release it on an hyzer angle, and it'll still flip over to do an anhyzer line, and in a few cases it even flipped over from hyzer to a roller. It's probably an amazing disc for beginners. I might bag it for tail wind sweeping left to right shots.

For reference, I was throwing it roughly 100m every shot except for the ones that became rollers.

More stable, super-grippie, love it‼️

Doesn't sail quite like my Opto or Gold plastic Rivers, but grippy in wet conditions. Definitely one for morning dew rounds, or when the rains come in. Pretty much the upgrade from base plastic, but not quite premium.

It remains me of Kastoplast K3 we will see how durable it is if feels like a better base plastic

This is a sharp looking disc. Although it is more than a base plastic, it just doesn't have the premium feel. The grippiness is better than base but still nothing special. I would not go out of my way for this plastic nor would I purchase it again.