Initial thoughts and comparison to the Sensei.
Shape. Overall I think the shape feels extremely similar to the Xai/Sensei. The indent on the sides is not as pronounced on the FM, so it does have its own unique feel to it. Obviously without having buttons on the right side may benefit with different grip styles. The contours of the FM do make it very comfortable to hold, the Sensei feels a little more round overall. It's a great shape, perfect for my grip and play style.
Switches. The switches feel great to me, they are noticeably more pronounced and slightly heavier to click than the Sensei. The M2 sounds a bit louder than M1 but they feel the same tactilely. To me the side buttons really dont have much travel at all, I have no complaints. When you look at pictures of the FM the side buttons seem to be slightly more forward than the Sensei, but when I hold the mouse they are practically identical as far as placement.
Coating. The top coating feels exactly like the Sensei raw, the sides are extremely smooth plastic and very nice to the touch. I had no issues with the hour i've used it.
Sensor. The 3310 speaks for itself. To me the sensor in the Sensei feels more "floaty" than a 3310 or 3366. The placement of the sensor on the FM is just slightly higher than on the Sensei. I'll mention the DPI switch because I'm talking about the sensor. Personally I would like to see the DPI switch on the buttom of the mouse and have the top button mouse 6 to bind to grenades or other binds.
Weight. Sensei raw is 90 grams compared to the FM at 86, not a huge difference but it is noticeable. I was hoping the FM was lighter.
I do have a couple small complaints about the FM but nothing that will prevent me from using or recommending this mouse. First, the LED is extremely bright and bleeds through the side buttons like previously mentioned in the thread. This seems like it could have been easily prevented pre release. Second, when I look at the mouse feet they seem to be thick enough but it does seem like the mouse itself drags on my mouse pad slightly. I'm thinking maybe once the mouse feet break in it will be less noticeable, and I also use a Zowie gtf-x so it may just be the sound. Edit. The more I use the FM the less I notice the drag, I think it was the initial sound of the mouse feet before they break in.
Lastly, I feel an extremely small bump in the middle of my M1. I can't tell if its in the coating and I can't visually see it, but it is annoying none the less..I would prefer it to be completely smooth.Edit. Unfortunately I am returning the mouse due to the paint bumps on M1. The $70 price tag is a little steep to have these types of imperfections IMO.
I think I'll be waiting for the scream1 to release at this point.Edited by a5page - 2/4/16 at 7:39am