I just bought the X4 to replace my Logitech M100, the cheapest Logitech (RM19.90). So my first impression is the mouse looks great, and the dpi works nicely. However, there are 2 things that I'm not satisfied with.

First, the RMB is dead silent, but not the LMB, but I can live with it.

Second, the button side of the mouse is not balanced. when I click the RMB the bottom left side of the mouse is lifted. This really spoil my gaming experience and I kind of regret buying this instead of buy another M100

Edit: Forgot to add, the mouse works badly on my table, without mousepad. The table is solid blue color with smooth surface (the M100 can run on it without a problem).

This post has been edited by arifoc: Nov 9 2014, 07:15 AM

Second week of using the X4.... the LMB start to not responding.. =.="
I need to press it really hard to make sure it is responding.