Works great (if you know what your doing)
I have been using this app for 2 years now to give presentations. iPhone 4 and now iPhone 5 with MacBook Pro and office 2011. Every now and then I would have some hang ups, but they always turned out to be something I did. Just recently I updated the software on my MacBook and to my surprise it stopped showing my slides on the iPhone when I was going to present. After some research I discovered that I just needed to save the PowerPoint in presentation mode. It then worked great
Jkampling about
i-Clickr Remote for PowerPoint, v3.1