Summary: The first thing i noticed when using this mouse is the tracking felt inconsistent and inaccurate. Then i realized it has nothing to do with the sensor quality or how well the sensor 'sees' the surface, but it has to do with the designed location of the laser sensor. Most mice it is in the middle, or very near the middle of the mouse. The M705 has it located near the edge of the mouse, nearest your ring/ pinky finger. I believe this is the reason tracking is so difficult.
Summary: Clicking the button behind the scroll wheel changes it to ratchet or to free wheel. The button is in the way with the scrolling feature rubbing against the scrolling finger. It is important to me not to have the added tactile feel when using the mouse. I would rather have better recessed or just some where else out of the way.
Summary: The M705 is an alright mouse. That's what I'll say about it. If you've never used a quality mouse, you might not be able to tell that it's performance is sub-par. I assure you, however, that it is. Relatively small, the M705 fits well in my relatively small hands. I can't really imagine palming this mouse, but I can't really imagine palming any mouse. All of the buttons and the scroll wheel are nice and responsive, save one problem I will cover later.
Summary: Great wireless mouse. Works great.... and then after about 6 months, the left click gives out and you have to fix it. And fixing it can come close to breaking it if you're not careful. The left click broke twice me for after about a year and I had to buy a replacement. But it is a good mouse to buy, if you can get it cheap online.
Summary: Bought this mouse because of great experience with v450, which now broke due to years of use. Now full regret buying this model as the sensitivity is horrible when you want to move across small distances ..say quarter of a cm, the pointer would not move on the screen. When you increase pointer speed on the OS, the pointer would move too much over long distance. I hate to say it, even my old MS mouse performs better.
Summary: I am on my 4th Logitech Marathon Mouse M705 in the last two weeks (the first 3 returned to the store), and hopefully this one works OK. If not I need to look for a different mouse/manufacturer. The first M705 had a wobbly wheel that would rattle any time I move my hand and the mouse faster than at a snail speed. The second one would scroll back up half a page after I scroll it down, like the wheel was mounted off center.
Summary: Just purchased this mouse last week. the middle mouse button now only registers a click approximately 95% of the time. the left mouse button only registers a click 99.5% of the time. verified with video. occasionally merely holding down the middle button will trigger scrolling up. the set point software disables the ability to hold down all the peripheral buttons, sometimes relieved by setting periphery buttons to generic.
Summary: I do realize that sometimes you buy a dud, but here's my experience. The mouse just doesn't track like it should. My cursor will skip around the screen like the batteries are about to die. That is not the case, but this happens up to a couple times a minute. We were not able to return the mouse, so I've been dealing with the issue. The second issue happened tonight. The mouse sits on a slick black alienware mouse pad, and tonight it slipped off the desk.