In use, and from a Logitech Performance MX is an ultimate happiness level of skiing and precision of the cursor, no latency in the movement of the cursor to the game or manipulations which require finesse and tact .
In terms of IPR if I do not say the MX nonsense should not exceed 2000dpi and without being set to maximum, I was afraid that the 6400 Mamba is excessive, well it probably is but I office was set to 3200dpi and it is very well managed, I must be able to mount more for less mouse movement but I already use just under half a Vespula mats, DPI would rise spoiled me even more the surface use.
The Mamba is a superb upgrade for me despite not detachable wheel (free wheel there quickly takes taste) and the inability to change the scrolling sensitivity (strange for a mouse of this caliber).