"As a keyboard, the Apex M500 has a very specific market and design focus. It is minimalistic, without extra buttons, USB ports, or even custom keycaps. In terms of durability however, the Apex M500 is very solid and the high quality of Cherrys MX switches is widely known. Even though its external body is plastic, the Apex M500 does not feel cheap at all"
E. Fylladitakis - Anandtech.
SteelSeries Apex M500 keyboard review by Anandtech - Introduction & Conclusion.