I really wanted to like the MD3 as it is marked as a Stable to OS mid and it feels a lot like my beloved Auroras. I've given several different plastic types a chance over the last 8 months or so, but have given up and returned to Rocs.
What I've tried:
2x CMD3 stock stamp
1x SMD3 swirly
1x Flat/Glow CMD3
1x Luster CMD3
My favorite by far were the stock stamp CMD3. They both started off stable/overstable and flew much like a heavy DX Roc out of the box. The first one I owned instantly made the bag, but wore in to straight rather quickly for a premium plastic disc. I heard about the glow flat tops and that they were supposedly more OS, so I purchased one to replace, and boy was that wrong. The first throw out of the box, on a slight hyzer, flipped and glided before a tiny bit of fade. Each throw after that was the same, and after only a handful of tries, this disc went on the shelf.
I then grabbed another stock CMD3, and really liked it, but just like the original, it was losing its extra stability rather quickly. So I heard about and purchased a luster plastic CMD3, and just like the Glow, it had discernible turn at high speed. I was thinking it could be some OAT on my end, but my Auroras don't turn unless I want them to, and they're beaten to understable at this point.
TL;DR
I really wanted to like this disc because it feels great, but I can't keep spending near $20 on discs that are supposed to be the "most os run yet" only to find my stock runs to out-OS them. Maybe I'm missing something, but it seems like an MD4 is needed.. hopefully it will feel as good as the MD3.