I have only been throwing Teebirds for about a year, but i'm pretty sure they have helped all aspects of my game. After a decade of playing disc golf and never improving, I finally took the advice to "disc down" to the Teebird. At first I was frustrated that it wouldn't go as far as my distance drivers, but slowly, and with lots of field work, the Teebird taught (and continues to teach) me about the little mistakes in my form. It has also helped my woods golf game tremendously. Trying to push a wraith 400 feet through a narrow gap in the woods is simply not a high percentage shot for me. Eating humble pie and getting a nice 300ft controlled shot with a Teebird has been a revelation.

I carry three: 174g F2 Champion, 174g F2 Shimmer Star, 174g GStar. The Champion is the most overstable. Thrown hard and flat it goes straight and starts to fade 80% of the way through the flight. The Shimmer Star started out overstable but has become very straight with a minor fade. The champion won't hold an anhyzer line very long, but the Shimmer Star will and will consistently fight out of the turn at the end.Neither of these have a lot of glide so I can throw both in any wind and know what will happen. They are point and shoot discs. The GStar is a little more touchy. It definitely has more glide and wants to turn. I would say the flight numbers are more like 8/5.5/-1/1. I can get some nice high speed turn out of this which it will only barely fade out of at the very end of its flight. I really like the ability to make so many different shots in so many different conditions with one mold in three different plastics. 

The original! Everybody makes a disc like this now but, this is pretty much where it began. I've had a Metal Flake 175g in my bag for nearly 8 years and it's not going anywhere soon. I've bought tons of similar discs that do similar things. I always go back to my Teebird. It took maybe three years for it to start getting off of its flight numbers a little. It's still reliable. Always. I had one as a beginner and it was my gauge of how my skills are progressing over time. Still is now, I guess. It's work horse, for sure.