I own both the g940 and the MSFFB2. Both have that gritty feel when the motors are powered. I thought it might be a little wierd when I first got it, but you don't even notice it.
I could never use a non-ffb joystick again. The pros far outweight the cons.
In a comparison of the MSFFB2 and the G940. The G940 stick is much better.
Sure the G940 has some out-of-the-box issues, but after a few tweaks to adjust spikey rotaries and rudder pedals, the stick itself is far superior to the MSFFB2 in every way. Better built, better grip, better buttons. Just buy it!
I bought the MSFFB2 so I could mod it. But the G940 is the stick I use everytime. I am looking for another one, as a backup.