Why I recommend this iExplorer? There are number of benefits you will get using this app, one of which installing Siri GUI on iPhone 4, 3Gs and iPod Touch which is currently becoming trend in iOS community.
And you will be able to preview pictures you've taken without using Apple's software and transferring the image directly from your device or copy files in inside your device and paste it to another folder or partition -- with a simple drag and drop ability.
Here is a quick shortscreen of iExporer if you use it to browse your iPhone content:
I think iExplorer is a must have application for your iPhone, iPod and iPad. One more thing this app can be used to your device, whether it's jailbroken or not jailbroken.
If you are interested you can visit the iExplorer official website to learn more about it or download >>> here is the link.