Things that bothered me:
- The mouse wheel is very stiff
- The key to flat
- The buttons are too sensitive and often produce unwanted clicks
- Additional buttons are not intuitive and partially difficult to achieve
- Ergonomically disastrous
- Hard
- Aluminum base flexes slightly
And that completely wrecking
- The sensor has failures in the horizontal or vertical movement, and since I was not the only one by far.
Due to the otherwise solid processing they nevertheless achieved even 2 stars.
When I tested on the lookout for a new mouse, the SteelSeries Sensei I felt pure bliss unlike Mad Catz.
