I got Targhee 2's. They didn't make it through 24 holes before the tread separated. I got Keen to send me a new pair and superglued them back together. 2 frankensteined shoes for the price of 1, is probably not bad in the end.
I've got two different Keen styles I play in. One is more sport sole, and one is more 'walker' sole. I'm a believer. Comfortable and durable.
Full disclosure: 1) I may not play quite as much as some that have commented here, and 2) I have a throwing style that doesn't stress shoes the way others do. 3) I also have some Merrells I like, but haven't used them for disc yet.
The construction has held up really well. I just got rid of my first pair, not because they were falling apart, but because the cushioning had become compacted so they weren't providing the same bounce for all the previous miles of tramping. Definitely got my money's worth out of those. That's a great shoe.
I have a pair of Targhee 2's that have lasted over a year playing all year round, tread is still there but wearing out, still very comfortable shoes. I am about to buy a pair of Keen Newports, a little cheaper $75 and still built about the same shoe with less aggressive tread that will wear better on concrete pads but still keep you from biting it on wet grass. $35-50 shoes are good until they are giving you painful blisters on the back of your heel, and ripping apart after a few hard rounds, or get water logged. I would rather just pay the $70-100 once for the year and get it over with.
I love my pair of Keen Newport Trails. They are the most comfortable and athletic waterproof boot that I could possibly find. And believe me, I spent too long looking for the perfect shoe. My last pair were Merrell Chameleons and they were also great, but were not waterproof and thus became dingy and stinky from getting soaked all the time...especially since don't usually let the elements deter my playing.
Long story short, I would highly recommend the Newport Trails, but after playing in them and checking out many others, I'd also recommend other shoes by Keen as well. But, I know people who like Merrell and Salomon as well. You should take into consideration whether you want a shoe or boot, and whether or not you want to keep your feet dry. (I've heard Keen Dry may be the new GoreTex.) Plus, there's also something to say for picking a shoe that fits your taste.
Oh yeah, I also took a relative of mine, who is a Pedorthist (shoe expert), to the store with me to check out their shoes and boots for disc golf and she picked out the Keens as the best made shoe that also provided the most support for your feet. Given that I was already leaning towards the Keens, my decision was easy, and I haven't regretted it one bit. Those shoes are awesome!
I have played in Merrell, Solomon, Nike, Columbia, Adidas, and Dunham. My Merrells always tore after about 4-6 months of play. The soles of the Nike, Columbia, and Adidas wore out really quick but had great grip. The Dunhams were too heavy to play comfortably. The Solomons were great until they broke in...approximately a year of wear, now they have little support in the ankle and across the foot. The nice thing about Merrells was that they are the most comfortable out of all the shoes.