Took instead of the dying X7 (used from more than 8 years, replaced 4 pieces). In general, everything suits, but the X7 has cut-out sides and is more pleasant in the hand, I got used to it for two days. I did not understand for whom and why 8000 Dpi. The courier brought a crumpled box. It will probably last a couple of years, but the next one I will still take the A4Tech X7 - a habit.