optical mice

Just got the mouse almost a week and so far it has been great.

Pros:
1. Fully programable 8 buttons, required driver installation and a latest patch from Logitech weblink. Installation is a breeze by the way. Default setting for 8 buttons are vey helpful and great for multipurpose uses. My fav is auto switch among open programs. One click and a flick of finger you can change from browsing internet to burning CD, etc in no time W/O MOVING YOUR LAZY WRIST. I don't find forward and backword botton as excited because I used to it (I used to use MS optical mouse with forward/backward botton).
2. Mouse reponsiveness as well as accuracy are exceptional. Those hardcore gamers won't be disappointed. In order to experience true magic of groundbreaking MX optical technology, I recommend to adjust accerelation and speed response to your own liking. Go to control panel and double click on the mouse/keyboard icon. Try it with variety of surface or mouse pad that fit our feel the best. I love it on any wood surface desk.
3. I don't think that it is too heavy. Personally, I always thinks that typical mouse out there is too light. I find that this extra weight is just right for me.

Cons:
1. Designed for sole righty.
2. For those who use MS XP, make sure that you unplug the connection prior to turn computer into hibernate mode. Otherwise your comp will freeze up during awakening. In addition, you always need to press connect on the base unit everytime you plug the connection right back. All these will bring up the 3rd con.
3. This unit is not for laptop. All those wireling from base to the USB and adapter to base. In addition, you are prone to the problem as above-mentioned. If you use the mouse for desktop, this is not problem as you should never unplug the connection.

Summary:
If you have a $40 budget for a handsome looking, exceptional performance optical mouse, this is a must replacement for your old mouse on your desktop.

I've only had this mouse for a couple of days but thus far I'm pretty impressed. This mouse is replacing Logitech's dual optical which replaced the cordless Optical Mouseman Wheel. I replaced my first cordless mouse because it ate up batteries at a very high rate (I was lucky if I could get more then a month before tracking became erratic telling me it was time to change batteries), though some of the blame could be placed on my black mouse pad. The MX700 seems every bit as fast and accurate as the dual optical mouse it is replacing. If you use OSX, don't be concerned that the drivers that come with the mouse are only for 8.6-9.2. Without installing any drivers, all buttons work exactly as they should (even the program switcher).

About the only thing I don't like about it at this time is the power connector. The power cord plugs into the back of the USB plug instead of the back of the base/charger. This makes for an unusually long USB plug. If you have a Mac and plug it in to your keyboard it will protrude a good inch past the side edge of your keyboard. If you plug it into the back of the computer it will protrude a good 3 inches and if you have a PC and want to use the P2/S port you can add another inch to that with the P2/S adapter. That means you'll need about 4" clearance space in the back of the computer. Even though it would have added one more cord to the base, I would rather plug it to the base then the USB plug. While it is not a cheap mouse, both the mouse itself and the charging stand/base seem to be well constructed. For me the jury is still out for the button placement. Instead of the thumb button on the bottom of the mouse, there are two buttons on the upper left side of the mouse (back and forward buttons for web surfing-and they also work fine in OSX). Maybe I'll get used to their position in time. Also, unfortunately, with this mouse, southpaws need not apply, but I guess they're used to that.

As I've only had it a couple of days, I can't comment on the battery life per charge, but I expect it will only be a few days. Still, I prefer that to having to buy new batteries every month as I did with my previous cordless mouse.

Had my fill of Micro$haft cordless Explorer. Took 3 seconds to respond and was absolutely useless for gaming.
THIS mouse is way different. No lag whatsoever. You will not know you are using a cordless mouse except for the fact there is the noticable absence of a cord. I have three of them if that is an endorsement. The corded version of this mouse, the MX500 is the same lightning fast mouse, but with a cord. I have 5 of these. Logitech ROCKS!