Ballllllllllllllllsssssssssssssssss oooooooooooo sssttttttteeeeeeeeeeeeeeeeelllllllllllllll.
I dunno. Those Zirconium Dioxide bearings will wear down faster than Amy Winehouse's looks. But then again, I don't proclaim myself the World's Foremost Trackball Expert.
Hands/fingers/skin promotes corrosion to metal based surfaces. It certainly looks cool though.
The concerns about the optical sensors depend on the implementation. If your trackball has the sensor peeping at the ball, you are fked. But if the sensors are watching slit wheels, then the surface of the ball doesn't matter.
Do you see a red light at the bottom of your trackball?
Matias Quiet Pro (Dampened ALPS), Topre RealForce (87U 55g & 103U-UW), Filco Majestouch x2 (TKL MX Blue & V2 AI 104 MX Blue), IBM-M x2 (BS & RD), Unicomp-M x5 (BS black on black x2, BS Ivory x2, QT Ultra-Classic), Deck-Legend x2 (MX Black & MX Clear), DAS III (MX Blue), NMB-RT8256CW+ x2 (black space invader), XArmor U9BL-S (MX Brown) given for free to someone I hate, CM Trigger (MX Green), TVS GOLD (MX Blue) and a many many more (NMB, DELL, MS, ATT, KeyTronic, Etc...)
-- In the mail: Matias Mini QP - Expected in