I've been putting with Challengers for over a decade now.  I've switched to other putters but always come back. Great feeling putter if you like slightly taller putters inside the circle. It does have a "microbead" which for me just makes the edge not so "pointy" like you see in some other putters.

I have this disc in FLX plastic. This is my favorite approach disc. I left it out of my bag for a while until I figured out how to throw it properly. It its very sensitive to release angle, meaning that if you put a bit or anhyzer on it, it will turn over on you and set down way early. If you throw it perfectly flat, it will take a LOT of power and fly perfectly straight, then finish with a gently fade to the left. I don't use it for putting too much unless it is really windy because the fade is a bit more than I like for a true putter. The challenger handles wind well due to its flat top. The fade isn't punishing like it can be on other overstable discs, the overstability will not rise up and smite you like it will on a Buzzz. The overstable nature of this disc just makes it nice and predictable. This disc does what I wish the Aviar P&A would do, which is handle power. I tend to get death wobbles from my Aviar P&A, where as this one just takes it. The Challenger does have limits, downhill windy drives will turn this disc over, but otherwise it is just a sweetly reliable approach disc. Whenever I don't want a midrange to sail past the basket, I reach for my Challenger. 

Definitely my go-to putter. The jawbreaker plastic is great for hanging onto the chains and dropping in even if you hit the basket off-center.

If you can find them, the titanium ones are also stable enough for shorter approaches/throw in attempts (<120ft) in all wind conditions

I've tried a lot of different putters from a lot of different manufacturers over the years but the Challenger was one I kept coming back to. I got a few of the Ledgestone Crazy Tuff Challengers in 2015 and it's all I've putted with since. I was thrilled to buy four of the Reid Frescura CT challys when they dropped cause them ledgestone boys are BEAT IN. Just bought a couple of the CT jawbreakers, curious to see how these compare to the regular jawbreaker which I wasn't a huge fan of. I've tried a few other plastics too like cryztal and titanium, which aren't bad for approach, but  thought they felt weird in my hand for putting, too slippy or something. But that Crazy Tuff is where it's at for real though.