It's extremely easy to use. If you feel you need some more space in disc, you should try this application first. It will go to Temporary folders and eliminate all files in them. It can means MBs and Mbs of wasted space.
Double click the file and wait for a few seconds, you'll see a report telling the files and folders deleted, as well as the total size of the deleted files.
This kind of files are not usually useful and they are only wasting space when they are a bit old. We recommend you to use Erase Temp to free space from your HD by deleting useless files.