The disc feels pretty good as mids go. Plastic is awesome considering. I'd say it's the best base plastic out there. Less durable than 400. But so much better than dx.

I think mine might have been less stable. Was turning it a lot more than the numbers would lead on. I love having a fast mid, much like a fairway driver but with the controllable feel of mids. 

If you are starting out and want some base discs but not starter set discs. The ace line is one of the better options out there.

The numbers are way off but the name is accurate - this is a fast, stable midrange. It goes almost as far as a fairway - comparable to the Warship Imo. This disc goes straight and far for me in the summer. Too bad that the duraflex plastic loses most of its glide in the the cold and then it becomes a very ordinary midrange.  

DuraFlex 177g

I bought this trying to fit that overstable midrange slot in my bag, this disc is that and then some. I think that the Prodigy stuff can be a little hit or miss in my short experience throwing them. I got to a point where I could trust this disc thrown flat, but it really was more overstable then anticipated. As this is the intro line, I couldn't just trust it out of the box. Still a wicked nice feeling disc and good plastic.

DuraFlex 179 g

Bought this, and a few other discs, seeking a midrange that can fight a headwind. Much to my surprise, this "Stable" disc, for me, did the job better than others I tried that claim that distinction. Anyway, it could just be me and my rubber arm, as I have a hard time throwing OS discs.Well, based on the numbers, isn't the M Model S really a bit OS?

Oh, and I absolutely love the Duraflex plastic. Gotta make room in my bag for this gem.