With Patch Downloader, you just open the app, select the version of ESX from the drop down, and select a file repository (folder, drive map, SMB share, etc.) where you want to download the patches. It lists all of the available ESX patches as well as information about each including description and severity of the problem it corrects and the impact to the VM/Host. The patch grid can be sorted by column so its easy to bring all the CRITICAL patches to the top, for example. When you click download, it will download all of the VMware ESX patches you select to the repository, but skip any that are already there simplifying your ESX patch management by keeping your ESX patch repository up to date.