I was very pleased with the simplicity of Keynote Remote. All you have to do is open up Keynote on your computer, and then open up Keynote Remote on your iPhone or iPod Touch. Just don't forget that if you're working on an iPod Touch, you need to have a WiFi connection, otherwise the Keynote Remote app will not work.
After you're connected to your presentation on your computer, you can view your entire presentation on your iPhone or iPod Touch. When you turn your iPhone or iPod Touch in landscape mode, you can either view your presentation slide by slide, or change the settings so you can preview the next slide. On the other hand, in portrait mode, you can view your entire presentation one slide at a time, and view your slide notes at the same time. To change from one slide to another, all you have to do is give the screen a little flick.