Really? So being able to go back and forward(or back and paste in my case) without having to reset your hand position, or mouse position isn't an improvement?
I guess you have really large hands/fingers. I almost never accidentally press a button on my Logitech MX610. In fact, I can't remember the last time I did.
I guess I'm in the minority for using my thumb and ring finger to move/lift the mouse, then -- and those fingers are placed right where most mice manufacturers put those two extra buttons, as far as I know.
This point in moot since, on any decent mouse, you can specify the programs in which you want the "extra" buttons to work. So it shouldn't come up in the middle of a game. Assuming you set it up right.
I assume you meant "keyboard?" My basic Logitech one comes up as nothing but a "standard 101-key etc. etc." in the keyboard control panel. No configuration options to be found. I suppose I could install specific drivers, but I'd just rather have a clickety-clack keyboard, not just because of the lack of extraneous keys, but also because the sound of the keys makes me feel like I'm in a movie.
I don't call it wierd. I just call it kinda foolish.
If you think so.
If you can get a laser mouse that is certainly more accurate and requires no cleaning and can be used on almost any surface for 25-30$ that has extra functions, why not go for it?
If you do any work that involves precise mouse movement, like graphic design, then there's no logical reason to settle for a regular ball mouse.
Lack of accuracy -- How? My current mouse is more than capable of easily moving one pixel at a time at any position on my entire screen.

It certainly hasn't failed me in my amateur photoshopping exploits.
Requires no cleaning -- As irrelevant to me as the fact that an automatic-transmission car "requires no clutch usage."
Works on any surface -- Irrelevant. I can't remember the last time I used a mouse pad, and even though I'm just using the mouse on my desk, I still only have to clean it every few months.
Extra functions -- I just don't care.
Even if you just a casual gamer but like your mouse to do what you want WHEN you want it to.
Funny, that's related to the reason why I dislike optical mice -- both of the ones I owned exhibited erratic movement (making precise motions very difficult), and would frequently zip to a random corner of the screen, refusing to leave the corner until I lifted the mouse from the surface for a full second.
I used to play first-person-shooters around the same time, and
boy was it fun to come around a corner, only to suddenly be facing the sky or ground, spinning in a circle.
I'm not saying that all optical mice are like this, but it certainly doesn't help, and I just don't see how they're an improvement over my current mouse.
You don't have to spend much, but using an old ball mouse for anything more then wordprocessing sounds far to 1990's to me.
What can I say, I like to live in the past sometimes.
