[...] No, they've finally done something about that problem. The g402 and g502 have very solid wire bases on both ends.

Does g402 have same wire problems than g400 and g400s?

fuck's sake, just wanted to get g400s...

[...] well I use fast sens , so I got nothing to worry about anyway , right?

[...] The g402 sensor is the same sensor that the g100s uses, which is a relatively good sensor although the speed at which it starts failing is fairly low, around 3 m/s to be precise. That's where logitech brought in some new technology, the fusion engine, which is essentially just an accelerometer, but an accelerometer that takes over the mouse output as soon as the sensor starts failing. This seemingly expiremental tech works incredibly well and makes for a very flawless sensor. Plagiarised from http://www.overclock.net/t/1504917/logitech-g402-hyperion-fury-gaming-mouse-review-by-ino In the case of g400s it seems logitech cut a couple of corners and used a fairly cheap sensor, the Avago S3095, which has shown some fairly good results with few flaws. But unfortunately there have been some freak cases where certain users experience a bug where left to right movement tracks more distance (lower dpi) than right to left movement (higher dpi). If you are between the g400s and the g402; I'd much rather go for the g402, the more expensive g502 or try to find a second hand g400(non-S)

also last question to you condoM : is the g402's sensor better then the g400s one?

I am currently using the G402, it took quite a while to get used to due to it's size (small hands.) but after a few weeks, I have no complaints about it as it is a powerful mouse with a fantastic design. Without a doubt, I recommend it.

Qpad 5K. Had it for a couple of years, very good mouse and very large. 

[...] also , a complete different sensor.. any thoughts about that?