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Rating: 
Summary: Disappointing
Review: Seemed like a great idea, combine it all in one. I needed a small portable trackball mouse with 3 buttons, the optical would have been a bonus, especially in the track ball.
Sorry, if you need to use the middle mouse button (the ball doubles as middle button) a lot, especially by holding it down, then forget this mouse. In addition if you're using it in trackball mode the scroll functions are tranfered to the optics in the bottom and the slightest movement will shift your cursor off target. This problem is compounded by the stiff button action which means you have to grip the mouse firmly while pressing the buttons.
Also the tiny trackball doesn't have much range, something that might have been solved by the drivers but I really needed something that could be moved to different computers without installing drivers all the time.
End result, an essentially unusable mouse. I'm very disappointed.
Rating: 
Summary: Another winning no name brand product
Review: This is the 2nd time I have bought a mouse from a no-name brand vendor and this is the 2nd time I have been pleased.The first time was almost 6 year ago- a vendor was selling a mouse without a ball. It had 2 small pads that could detect X & Y motion. I have 2 of those and it still works great today. They require absolutely no cleaning. I remember seeing those mice back in the mid 80s as part of workstations sold by DEC. I always wanted one of them and finally someone sold one- not the main stream vendors like IBM or Microsoft- but a small no-name vendor. Fast forward to the present when optical mice are finally affordable and plentiful and often all designed in the same way... it is refreshing to see yet again a small vendor has taken the idea and innovated on it. The track ball on top of this device is surprisingly usable. The accompanying software lets you control the ball in a variety of ways - e.g. as a 2D scroll ball or as a up/down scroll ball + page back and forth for easy web browsing. You can also press down on the ball so it serves as a 3rd button that you can bind to other functions like, opening new apps or zoom in on the screen. The ball is removable so that it can be cleaned- good thinking on starlogic's part. Installation software comes on a floppy. I recommend you copy it to your local harddrive first before installing. There is no company web site. So help comes from either a 1800# or email to support. I use it under WinXP. Docs indicate it works under all Win OS'.
Also it does not come with a USB to PS2 connector.
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