Summary: Bought this in July / August 2011. Worked good at first. Just keeps getting worse.
Pros: Comfortable. Good design. DPI buttons on mouse.
Cons: TERRIBLE reception. Terrible response. Constant connectivity issues. Interference. Have tried adjusting DPI , keeping other wireless devices away. Nothing works. Even when I turn it on or off 4-5 times a day , that sometimes doesn't work. Drivers? Heh.
Summary: When it works, it is a very nice and comfortable mouse. However you have to keep the wireless very close for it to work, less than a foot. Other wise expect missed clicks, wheel not working, cursor skipping around the screen. I cannot recommend, and wished I had read these reviews.
Pros: The mouse itself is well designed, comfortable, and works the way I want it to, when it works.
Cons: Poor wireless connect, misses clicks, and skips around the screen when the wireless usb dongle is more than a foot away. Is very frustrating.
Summary: FOR THE PEOPLE MISSING CLICKS OR LOSING TRACKING:
Cons: -As soon as I take the mouse any farther than a foot from the tiny receiver, I start experiencing the missing mouse clicks and intermittent tracking that others have stated. So I put my receiver on a USB extension cable so that it sits within inches of my mouse, and it works perfect. Needing a cable for a **wireless** mouse to work right is a major major design flaw. Only two eggs because at least it works great when using it as a "wired" mouse.
Summary: As stated above, this is a solid mouse without being too expensive. My grain of salt is that if you want to switch DPI in one stroke, don't buy this, and the glossy plastic collects fingergrime like crazy
Pros: Size: the most noticeable thing about this is that it is heavy and is comfortable to be using for a while. Scrolling: the scroll wheel is actually slightly conical instead of cylindrical so it is simply more comfortable to use; also, one thing that annoys me is loud scrolling, and the ECO 600 is virtually silent. The box it comes in is very handy - sturdy plastic filled with molded foam for safe travelling I assume, but nice anyway.
Cons: To use the mouse 4 and 5 buttons, you must install GIGABYTE's software, which slows down boot time. For the forward side button (mouse 4), I feel like it is a reach from my resting hand position which can be bothersome if used extemsively. The DPI switches, but in a way that you must press one of the two buttons first and then go up or down in between 800, 1200, and 1600; again, a little annoying.
Summary: I plan on buying at least one more of these mice. This is my third Gigabyte mouse (2 wired and this wireless) and I will be buying more. Good quality and responsiveness.
Pros: Excellent tracking. No synchronization issues. DPI on the fly works perfectly. Good for gaming. Incredibly comfortable for my large hands. Good weight. I've used this on several surfaces that my LED mice balked at for reflectivity and it worked like a champ.
Cons: Battery door broke on the first drop (Four feet onto a concrete floor). Not a big issue, but could stand to be stronger.
Summary: The DPI "dots per inch" is the amount of pixels the mouse cursor will move, given 1 inch of movement. 1600 is very suitable for large tvs, maybe less for small monitors. LEDs on top indicated 800/1200/1600 DPI. OK, so I tested on multiple computers, to see the distance in which the mouse would show lag, or delayed time between mouse movement and cursor movement, I started to see very noticeable lag around 30 ft. This is more than enough distance for most applications.
Pros: Full size mouse, great for normal or larger sized hands. Side buttons, great for using "back" and "forward" commands for browsers, file explorers, etc. Adjustable DPI for adjusting movement speed when switching monitors/computers.*see other Wheel scrolls easily and quietly, and can be used as 5th button. Works upto 25+ feet from receiver.* see other Good rubber grip on thumb area. Comfortable.
Cons: Designed for right hand use, not recommended for people with left hand preference.
Pros: The mouse is large and fits my large palms very nicely, it is incredibly easy to use because of this. It is also very precise and the adjustable DPI is very convenient.
Cons: The placement of the laser on the bottom of the mouse is awkward at best, and since I use this mouse with my laptop it doesn't always work on the surfaces I rest it on since the laser is so far to the side of the mouse.
Summary: I put the receiver on a USB extension cable so that it's on top of my desk less than 2-ish feet from the mouse. I figure it's for the best since my computer is under my desk. In this configuration I've experienced no lag or hang ups. The mouse seems fast and accurate when I play games.
Pros: Pretty comfortable in my right hand. DPI buttons are cool but require the Gigabyte software to function, I think. Performance is good - I use it for gaming and flinging things between my 3 monitors.
Cons: I'm not entirely sure, but I think it may have been somewhat unreliable at range - just the occasional hang up.