Merlin InstantFeedback simply sits in your system tray and quietly checks your own feedback at any interval you specify watching for fellow eBayers to post for you. When they do, it will automatically post positive feedback for them from a list of pre-made comments, your own custom comments, or one at random. If you should happen to get negative or neutral feedback, you will immediately be notified so you can rectify the situation quickly. You can also mass-post feedback for everyone who has left feedback for you starting back a specified number of days, whether they've left it for you or not, with just a mouse click. It even will support multiple eBay accounts.