Mouse Action: Not too bad. It tends to be a bit jumpy and you have to have a lot of control in your thumb for you to pinpoint small objects on the screen. The signal is a bit choppy from the mouse to the receiver, but all in all, not too bad.
Mouse Clicks: Barely ok if you're right handed (which I am). Although if you're left handed, this mouse probably wasn't made for you. I have had no problems with using the main mouse button as my left click. In Windows 95 I had minor issues when I pligged in my regular Microsoft mouse. In Windows NT I had major conflicts (System would go down often) when I tried to customize the mouse buttons - I would only use it for a left click and pointer movement.
I do very few Powerpoints, but it works well for that. I do mostly software presentations where I have to navigate in an application and have exact mouse movements. I'm satisfied since I don't want to be tied to the laptop, but pointer movement could be smother.
The trackball is difficult to get used to if you use a mouse, but does the job well. The three buttons allow you to move around in your PowerPoint easily and the molded design is great for right handed people. I found I could easily move a fair distance from my laptop and still be able to control the presentation.
The device itself is very professinal looking, and works *great* with Powerpoints, and other presentation software that I use on a regular basis. The installation was very fast, just had to install Logitech's mouse software for it to be configurable.
In large, open auditoriums, I have gotten a bit over 30 feet distance, does get a bit chopy after that, but performs as it should within it's advertised distance. The receiver is fairly small, small enough to fit in my briefcase, along with a nice length serial cable. This device has an extra feature that many over look, and that many devices do NOT have. That is, being able to use multiple handsets with the same receiver. This is extremely handy for presentations with many people, without the need to hand-off the device to the next person.
The only minor problem with it, is that the trackball is a bit jerky. I do not use it at all during presentations, so it is no problem for me, but it may be for something that might find it of use. The problem here is that the trackball is based on magnets, not optical, which would probably make the device a bit bigger.
Overall, I rate it 5 stars for its outstanding performance, distance, sleek and professional design, and functionality.