I took to replace the g102 that had gone to Valhalla. And 102s I had 2 pieces. And all in a year they were killed to the point of inconsistency. Having decided to take Qatar as a replacement, and to be honest, I regretted it. Feels like a mouse for a. It creaks, backlash, there is no memory, well, just just do fu. If someone also compares it with 102, then I advise you right away, take 102. Yes, for a year, and then take a new one, but you will get this year from an ideal mouse. I never got used to catarrh in three months. She's not very much.