The side buttons are easy to reach in my opinion and serve their purpose. The driver is easily handled (albeit English) and good to use. An optical treat is of course the LED lighting the scroll wheel, DPI button and SteelSeries logo. These can be set as desired (pulsing or permanent lighted) in the driver. Even the intensity of pulsation and the brightness of the LEDs can be easily adapted.
The only downside of this mouse is the mouse wheel. This is compared to other mice (eg Logitech G400) rather wobbly and my opinion has too much play to the left and to the right. The screening is quite noisy and not looks very smooth. Here there are definitely better solutions from other manufacturers. Nevertheless fulfilled its purpose and of course, the mouse wheel also has a click.
Would there be 4.5 stars, I would have forgiven them. Due to the weakness I have mentioned me but ultimately opted for only 4 stars instead of 5.
Conclusion: - rubberized almost perfectly the SteelSeries Sensei Raw Except for the mouse wheel is! I use them on a 9HD pad from the same manufacturer. The sliding properties and precision are extremely good. (This combination is recommended only)