this is my 8th envy/proton putter, obviously I like them. that said, and this may seem like a minor nit-pick, but when I selected "170-175 grams", it's because I prefer the heavier weight. so when you send me a disc that weighs 168 grams, a) I already have several that weigh 168 and realize that those few extra grams are something I want, and b) I'm mildly annoyed that I'm going to have to buy another one, but likely from a place where I can select an exact weight (but not get the Prime free 2-day shipping).I didn't return it, never even considered it and I'm aware that I likely could have, and to anyone that doesn't have OCD in regards to putting practice, pointing out a mild annoyance over 2-7 grams probably seems petty. but to me, if I wanted a 168 gram disc, I would have selected 165-170 grams when I bought it.I putt a LOT in my backyard, and have gone through probably 20 or so putters until I found the one(s) that feel and perform the best for me. that's absolutely the envy with the proton plastic (the neutron plastic is good too, but it just doesn't do it for me, it's just a different feel) and that's the reason why I didn't rate it 3-stars because it truly is a 5-star disc to me.I just wanted to point out to anyone that may be reading this, that this is the 3rd time in the past month or so that a disc I received was 2 or more grams under or over the weight range I had selected. if you're particular about the weights of your putters (it's never happened with any other type of disc to me), you may not receive exactly what you think you will.just needed to get that off my chest. :-)