Summary: I love this trackball, better design than the older version, but still needs some improvements ergonomics wise. On the next version of this trackball, I really wish they could add some type of adjustable angle rest type of thing so you could have the trackball sitting in different angles for better wrist comfort.
Pros: Durable, comfortable design. Long battery life. The portability and not having to use a surface is great.
Cons: I have to remove the ball and wipe off the rollers every 1-2 days if I'm doing any gaming. For the most hardcore gaming, I'd recommend using a standard mouse. The middle mouse eventually started to press up against the right mouse a little if it's held down.
Summary: This is the best thumb-ball style trackball I've ever used with a laptop! I've seen some users complain about the size of the M570 being smaller than the previous model, but in my case that turns out to be useful. The smaller curve-under edge makes it easier to hold on to when using it on uneven or vertical surfaces like the armrest or side of a chair. Anyway, it's comfortable, precise, easy to clean, and lasts practically forever on battery.
Summary: I'm in love with this mouse. While I'm a little bit choked about the two year life I've gotten from it (using it for 4-8 hours pretty much daily), I'll definitely be buying it again. Ultimately, it's stood up to some pretty heavy use. Can't put a price on a healthy wrist, this mouse is worth every penny.
Pros: Finally found a mouse that has saved my wrist. The mouse itself works great, very customizable, great battery life, solid connection at distance from the computer.
Cons: Generally, with all trackball mice, the dirt from the fingers accumulate under the trackball. Need to clean the build-up out fairly often (I'm OCD with cleanliness of my mouse), but luckily it is designed for easy removal of the ball and easy access for cleaning. If you do this often the mouse will work like a dream. If you don't you might end up writing a negative review about the function of the mouse itself., After 2 years of use the left click button is starting t...
Summary: and im talking about battery life, after a year+ of constant use, i saw the red light flashing on the unit, the need to buy 4 extra rechargeable batteries was unneeded for the run time i got. This trackball has seen many a game that keeps it working, from GW2 and WoT to countless shooters.
Summary: I love trackballs. This is the most form fitting I have ever had. I am a software engineer/support engineer so I am on many hours. This has been my favorite mouse. However the issue of the left mouse button has rendered it useless at the one year mark. That is unacceptable. I am a heavy typer and beat my keyboard relentlessly. I am gentle on my mouse. My logitech keyboard is still rolling and the mouse is now junk. What gives? Not sure what the replacement will be yet.
Summary: First off, I love having a trackball mouse. I feel more comfortable and ergonomic. But after just 10 months, this rollerball mouse is failing on me. It now 'double or triple' clicks every time I push the mouse button and is nearly unusable. Dissapointed. And it is still in mint condition!
Summary: I've been a happy Logitech TrackMan wheel user for over 10 years, went through several units over the years and never felt the need to try anything different. Now that the TrackMan wheel has been discontinued I had no choice but to get the M570 as it is supposed to replace the older model. What a disappointment! Although the smaller unifying receiver is a nice upgrade, the ergonomics of the M570 are just bad.
Summary: However, the trackball I received came in a clear plastic bag I can only describe as coated in filth. Apparently this was a fairly heavily-used item previously, as it appeared to have food and skin particles which shook loose in shipping, resulting in a fairly offensive package. I understood that refurb. sometimes is a compromise, but I'm completely shocked at what I received.
Cons: I've purchased refurbished items many times in the past, and generally I've had no issues; a refurb. is usually within manufacturing specifications, and depending on the deal, may have a scratch here or there.