well, i can quite heartily say, your money will be well spent getting this mouse if u game, or have any need for on the fly sensitivity changing....
its gorgeous......not too different from MX510/518, same shape and size, but a fair bit lighter without the weight cage......add the weight cage and u can make it heavier in quite nicely spaced increments....
pros.
Good for medium to large hands.
Nice software with good options.
Independant X/Y axis sensitivity.
5 sensitivity modes u can set, or 4, or 3, or 2.....with 50dpi increments.
Nicely clicking buttons.
VERY good tracking on pretty much any surface u would use for a mouse.
Corded cord is nice, certainly makes a change from rubber...lol
Weight cartridge really does make a difference depending on how much weight and also where in teh cartridge u put the weights.....so anyone should be able to get the mouse the right weight and balance for themselves.
cons.
Smallpaws will find it a handful like the MX510/518 as its exactly the same chassis on top pretty much.
So many options you can adjust you might just get frustrated wondering if you are using the best one or should you fiddle around some more...heh
Less buttons, realistically u only have LMB, RMB and side button, wheel does tilt but its never an easy prospect to use that effectively in the middle of a furious battle for something...lol.....people who like to bind mouse buttons to switch weapons might wanna stick with MX510 or 518.....those like me who use Q will be happy with G5.
Overall, this is a fantastic rodent, i'm well chuffed i bought it and possibly a little of the placebo effect, but also the mouses abilities (the independant x/y sensitivity mostly) enabled me to go pwn it up on a few servers better than usual....heh
have found 15.8g to be my weight in the cartridge, and my sensitivity (X = LtoR, Y = UtoD) is at 2000/1800, 1600/1400, 1200/1000, 1000/800, 400/400.......
i hope others find joy in it...if u dont please say why, would be interesting to know...thats assuming its ever released outside of 3rd party UK retailers...heh ;-)