Giving it 4 stars because the manufacturer flight numbers don't match for this plastic.   This is now my turnover disc after about 10 throws with it.   Started out flying straight with a slight fade.....almost buzzz-ish.   Now I can flip this thing up and it slowly drifts right and starts to fade right at the end.   So its nice if you know what you're gettin

Just how infinite recommends, the m model os is a disc for intermediate players. The plastic is way more durable than expected. Super smooth feel on backhand releases. It's factory flight is great, but beats in to be greatly controllable.

Great disc but gets a star knocked off for being the opposite of overstable. This is flippier than any m model US I have thrown. That being said, great for the price if you know what you're getting

Baseline plastic, penned weight 180, RH player.

When I first got this disc I wasn't a fan. It was a bit of a meathook for me. After I hit a few trees its the straightest most dependable disc I have. RHBH slight hyzer it will hold the line through out the flight. Thrown flat it glides straight as an arrow. Anhyzer it holds to line for a good amount of time before hyzering out. RHFH hyzer flips up and flies straight. Anhyzer & flat releases FH for me it rolls over after about 50'-100'. Excellent disc would recommend for anyone to give it a few throws. After I broke it in it became my go to off the tee for 250'-300' shots 

This is my approach disc if I need a gentle fade, and want the landing to stick. I haven't had any bad rollaways or skips with it. Played in the Prodigy Ace Line challenge, and this is my favorite from that series of discs. Also, the feel of Base Grip is very good - to me it's a step up from DX plastic despite the similar price range. The performance of this disc has kept it in the bag after many rounds. 

I absolutely love this disc and bag one. It flies dead straight with almost no fade at the end. Good for practicing form 

Plastic: BaseGrip

Weight: 177g

Feel: BaseGrip might be the best Base Plastic I've ever used, the grip is incredible and the durability is 2-3x that of DX or Pro-D.  My M Model OS is a flat top, which really allows for a confident grip.  The rim of this 6-speed Mid is actually very comfortable for Backhand, but not so much Forehand.

Flight: This disc is touchy, too much power without enough hyzer and this disc flips over and crashes right, which is why this isn't super "Beginner Friendly".  However, for the same reason, this disc is excellent for learning Hyzer Flips, as you really need a perfect angle to get the flight you want.  And that flight is gorgeous, A soft flip-up and the disc just glides until it fades back left. 

Conclusion: The M Model OS is just a bit too touchy for me to really rely on it, I'd rather throw something that I know won't punish me for a slightly bad Hyzer angle.  That being said, if you wanna learn Hyzer Flips, get this and throw it a bunch.

Sidenote: Perhaps in DuraFlex this disc would be more consistent and true to its "OS" moniker.

As I stated in another review, I'm very impressed with the Base Grip plastic. Holds up very well and has excellent grip. The M Model OS is not super overstable. I'd say it's between a Buzzz and a verdict. Has a reliable finish, holds up well to my not super clean release. Feels good. The rim feels a little different than a regular mid. I definitely think this is a fast mid almost fairway driver. Can take a flick, but not as well as my verdict does. I'd give this a 4.5 as there are better mids (My favorite mids are the axiom pyro, dynamic discs verdict, MVP Matrix, and Discraft Buzzz SS) on the market, but it's definitely a fine offering. 

The M Model OS is a nice midrange that is pretty standard as far as mids go. I didn't actually think it deserved the "OS" title, as it was just pretty straight for me. I'd give it more of a 0, 2 turn and fade. It usually came back at the end of the flight, but it was no overstable meat hook. It actually went pretty far as well!

I enjoyed this disc in the Base Grip plastic, which is an awesome plastic for the price. Like in other reviews, I've said this plastic is likely a step above DX as far as base plastics go. It can take a beating, and provides excellent grip in rain/snow.

This mid is way to fun not to throw around a course. It glides and glides, and fades forward. It handles angles well, and the plastic is pretty durable. This may be the new flight time leader for my mids.