Credit: Jose Berengueres and Tony YuEvery so often, mouse manufacturers take a stab at overhauling the fundamental shape of the computer mouse. Usually, the goal is to make the mouse more ergonomic to relieve all-day users from the aches and pains of prolonged use. Credit: Jose Berengueres and Tony YuBut the tradeoffs could be problematic for many users. For one thing, the Fleximouse doesn't include a scroll wheel or the array of extra buttons that many mice sport today. Logitech seems to have landed on a popular ergonomic design with its MX Master series.