- Design/ergonomics Mouse length Backlight Work accuracy Cool backlight on the "zheppka".
- Driver and setup issues There is no certainty that the soft-touch coating will last long After 8 months of work, involuntary double clicks began. There are no service centers anywhere. The hotline sends you to the site to chat with the support service. The support service refuses to help with the remark "oh, this is probably a hardware problem, call the hotline." See comments