Kastaplast’s K1 plastic and K1 glow makes all other “premium plastics” in other brands feel like garbage grades! In really cold areas consider K2 plastic... K3 not recommended unless you like the feel of a rubber eraser.I never thought I’d bag a driving putter, but this thing is fun and my average putting distance after an upshot or a short 200’ drive has been cut in half since bagging this disc... I’m usually putting from 10’ now.Kastaplast sure is good quality... their glow plastic feels almost as good as their standard K1 (just a little harder / more stable) and it glows about 3x as bright as any other glow plastic I’ve tried (see pic). Also Kastaplast takes dye better than any other brand if you’re into that... this has become my favorite disc... it’s extremely slow and very stable, so thrown full power I can barely get this thing out 200’, so my distance is usually accurate to about 10’ with the Berg, and this sticks to grass quite well. I no longer struggle w/ short drives... I just wish I would have picked one of these up sooner.Not recommended as a putting putter... also, the wind can throw this thing around similar to a disc of lower stability, so I’d say it’s a little to glidey for a headwind.Slowest disc ever... very stable... lots of fun. If I’m in a field throwing my distance drivers, I usually practice with my Berg’s too... rarely are they not parked exactly where I throw them... I mostly power grip these up to full power and the distance control is rediculous... I’m lucky if this thing goes more than 200’ on a full drive and I never realized how fun it can be to throw hard and park a 180’ short hole vs. some finesse shotor flick... there’s something about it that is just so satisfying!