When comparing Logitech G500 vs Logitech Performance Mouse MX, the Slant community recommends Logitech Performance Mouse MX for most people. In the question“What is the best mouse for programmers?” Logitech Performance Mouse MX is ranked 1st while Logitech G500 is ranked 3rd. The most important reason people chose Logitech Performance Mouse MX is:
Hitting a button behind the scroll wheel changes the scroll wheel from clicking up and down in a controlled manner to allowing you to flick it and quickly scroll through large portions of a document.
Specs
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Pros
Pro Adjustable weight
This gaming mouse also comes with weights (6 weights of 1.7g, 6 weights of 4.5g) that can be added on with a maximum of 27g of weights at a time.
Pro Thumb-rest
The Logitech G500 has more an edge on the left side for users to rest their thumbs.
Pro Braided cord
The Logitech G500 gaming mouse comes with a braided cable.
Pro Great for palm grip
Clearly designed specifically for palm grip.
Pro Onboard memory allows saving settings on the gaming mouse itself
The onboard memory will allow the user to store on custom profile no matter what PC they plug the device into.
Pro Dual-mode scroll wheel
This mouse has two scrolling modes - notched and freescrolling. The modes can be switched on-the-fly with a button located just below the scroll-wheel.
Pro The thumb buttons that are close enough together to be used in FPSs
Pro 10 programmable buttons
There are ten programmable buttons on the device.
Pro Horizontal click scroll wheel
The mouse wheel can be clicked down in the center or to the left and right. This created three different buttons in one.
Pro On-the-fly CPI switch on the side of the left click
There is a switch on the side that allows for on the fly CPI switching.

Pro Great value
Pro 'Flickable' Scroll Wheel
Hitting a button behind the scroll wheel changes the scroll wheel from clicking up and down in a controlled manner to allowing you to flick it and quickly scroll through large portions of a document.
Pro Ergonomic design
The MX is an full-sized, ergonomically designed mouse that is designed to fit the hands of those who prefer a palm grip.
Pro Works on any surface
The MX uses "darkfield" technology to allow it to work on glass, mirrored surfaces etc.
Pro Good battery life
Once fully charged the mouse lasts for several weeks of moderate use before requiring further charge. Users are notified through lights on the mouse itself, and systray notifications when the mouse is nearing the end of its charge (generally several days before). Even after several years of use this appears to be the case.
The mouse uses one AA battery. A rechargeable NI-MH battery is included. The battery compartment is easily accessible, requiring no tools to assist.
Pro Well designed extra buttons
Three programmable buttons are easily accessed by your thumb.
In addition to the Zoom, Forward and Back buttons depicted, the thumb rest has a button for switching between applications, the mouse wheel may be held to allow drag navigation, and the mouse button may be tilted left or right for horizontal scrolling.
Pro Logitech Unifying Receiver (Dongle)
The [Logitech Unifying Receiver][1] allows you to connect multiple (up to 6) devices through one single, small dongle. The dongle itself is made up mostly of the USB connector, meaning it's small and so stays out of the way, and is unlikely to be bent or broken if knocked.
Pro Works whilst charging
Though the mouse works wirelessly, it's recharged via USB. When recharging, the mouse continues to work .
NB: The mouse still communicates wirelessly, so requires one USB for the Logitech Dongle, and one for the charge cable.
Pro Useful accessories
A travel case, a USB charge cord and a USB-to-outlet-power adapter, and a USB extension cord for the receiver.
Cons
Con Not produced anymore
Logitech G500 was replaced by G500s in 2013 and that in turn was replaced by the G502 Proteus Core in 2014.
Con Old

Con Too heavy even without weights
Con Scroll wheel is too loose
Clicking the scroll wheel is not precise and often the user will left or right click the wheel instead of actually clicking the center click.
Con Suffers from acceleration
All Avago ADNS-S9500 laser sensors suffer from acceleration issues and being that is the sensor used in the Logitech G500 it is a problem that this mouse suffers.
Con No driver for Mac
Con Durability issues
A common problem are the buttons failing after only a few months of use.
Con Price
The price is currently hovering around the $70 mark, being marginally over this price from a number of outlets, putting it at the maximum limit of this question's price range.
Con Middle click not safe
When pressing the middle button by pressing down the scroll wheel, the left or right scroll-wheel buttons can be triggered. That can lead to accidentally going back in the browser or whatever is configured for these buttons.
The middle click should be a safe thing, where nothing else could happen.
Con No left handed version
Con Heavier than a typical mouse
At 147 g, compared to a typical weight of about 100 g, the mouse may take some getting used to. More often than not, heavier mice can tire your wrists after extended use without rest.
