Summary: The m705 and m510 has an offset laser which is horrible for gaming! Tracking is off if you're a person who uses their wrist for a pivot point. When you move left, the pointer will move left+down. Moving right will cause the pointer to move right+up. Its a nightmare to play first person games. I have both of these mice and replaced my m510 because I thought the laser was defective. Then I find out the same thing was happening with my m705.
Excerpt: Recently bought the Logitech M705. I'm very disappointed with it. Has spells of inaccurate tracking and frustratingly slow response at times. I would not recommend it. I have used a Logitech MX1100 for years and totally loved it, completely satisfied. I expected the M705 to live up to the performance quality of the MX1100. It doesn't.
Summary: After using for a year, I discovered it has sensitivity issue with signal. Can not jump browser anymore. Will still try to solve this but the whole school whom were given this mice had stopped using it on our brand new Window 7 PC.
Excerpt: This mouse is smooth and works flawlessly. Tracks well on most all surfaces. The cost is a little bit pricey compared to other logitech mice. My biggest complaint is the size. The photo makes the mouse look larger than it is. I was looking for something that would fit my hand well, but this is smaller than I anticipated. I do like the software that allows me to change the response time of the clicks, and the speed of the cursor.
Pros: Accurate Tracking, Fast Response, Glides Smoothly, Works On Any Surface
Summary: I bought this mouse and used for 1 week so far. Everything is very good and almost perfect to me, and I am even surprised when discovered the 8th hidden button (default apps switching button hidden below forward/backward hotkeys). This mouse, however has a flaw that is quite deadly. And that's the main reason it scored 3 stars at last, even with a lot perks. The sensor is located at the border of the mouse.
Excerpt: I have big hands and wish that this would be more comfortable, but it was not and didn't work well unless on a desk. You struggle with using it on a couch cushion or anything with a glossy material.
Pros: Works On Desk
Cons: Catches Easily, Limited Surface Compatibility, Not On Shiny Surfaces
Summary: I've had this mouse with the keyboard combo for around 2 years now, at first it was great, i was really happy with the product and it didn't disappoint me, however after a while it begins to show signs of mouse lag even when moving the receiver closer to the mouse (extension cord + sticky taped under the table) and replaced with brand new batteries. I would recommend this mouse for a average user.
Summary: The mouse is great while its new. After a few months of heavy usage (photoshop, after effects, final cut) its buttons start to double click when I only want it to click once. I had my first one for about a year and a half, then it started to double click like crazy. Now I'm on my 2nd one, about 5 months into it, and it starts to show early symptoms of its predecessor's defect.