I'm a huge fan of gaming in general. Doesn't matter if it's PC or console, it's something I enjoy. The one thing I never really felt at home with, however, were mice. Unfortunately, I could never find a mouse that really felt 'right', or didn't hurt my hand after prolonged use. The mousing 'motion' is just not something that, well, meshes with me. I've been through dozens of Logitech and Razer mice, and eventually gave up. I knew what I wanted - Thumb control, like playing with a controller. I eventually found myself looking into a trackball, and settled on the old "red ball" trackman wheel.The Trackman Wheel, unfortunately, had a few issues. I didn't mind that it was wired. I did, however, find myself frustrated with the lack of forward and back buttons. Second of all, the optical DPI was just way too low for precise aiming in FPS games. If I remember correctly someone rated it at 400dpi, which is just unacceptable. A solid trackball, but these two little errors sent me slinking back to my trusty Razer Lachesis.I actually wrote Logitech an email describing a "gaming trackball" with laser tracking. I highly doubt they ever read my email, but they actually released the exact product I wished for, so I jumped right on it!Unfortunately, I have yet to get an invite to the Vine program, so I actually had to dish out the 49.99 myself. I don't regret it!First of all, the wireless technology in this trackball is certainly up to date. Latency is not an issue at all, and having the option to be wireless is certainly a plus. I do wish it came with a detachable cable in case you didn't want to deal with the battery, but then again, the single AA battery this unit requires promises to last up to 18 months. If this is true then I cannot mark this product down. I've had it for two weeks now, and so far, so good. I am running Windows 7.The addition of back and forward buttons answers the plea that many people have been crying for ever since the old Microsoft Trackball Optical was discontinued: A fully featured thumb-controlled trackball that doesn't cost 400 dollars due to becoming a collectors item.To make things better, most people always agreed that the Trackman series had better ergonomics than the MS Trackball, however the lack of buttons was the big deal breaker. It seems that most companies focus on their palm/prominent fingered trackballs and totally ignore the thumb-based ones.The M570 is the answer to all these problems, well, and more.I was quite shocked and excited when I heard that it was using a laser sensor. I am unsure of the DPI since Logitech doesn't seem to release that information, but it's certainly much higher than the Trackman Wheel, which makes it a godsend. The accuracy is top notch, the glide of the ball is just right, and the buttons feel solid. Nevermind the comfort of the ball in general. There are no problems there. I really cannot find anything wrong with this ball.If I was going to add anything it would be the following: Actual published DPI rating, Additional buttons for on-the-fly DPI adjustment, and finally one of those awesome Hyperscroll wheels that Logitech has released on their gaming mice.It seems that Logitech is even downplaying the fact that this ball is laser-tracked. The question is: Why? I know I am not the only person who games with a trackball, and while many people have settled with Kensington's balls for the task, I have been waiting out for an appropriate thumb-controlled trackball. Perhaps the M570 is just a test before they release the true "gaming grade" trackball? Or will this be the final hurrah in the trackball world?As of writing this, the M570 is undoubtedly the best Trackball on the market, not only for gaming but also casual use. Despite the few features that could have been included, the addition of laser tracking and two control buttons make it tough to beat and fills a huge void in the market. One can only hope this device's success convinces Logitech to continue further with their trackball efforts. Until then, the M570 will be my ball of choice for headshots. 

Question: What do you think about each button?
Answer: The Trackman Wheel , unfortunately , had a few issues . I did n't mind that it was wired . I did , however , find myself frustrated with the lack of forward and back buttons .