I just logged on after a couple of years and my BidPoints are still there! Pretty cool that they didn't expire after all this time.
This service if for when you really, really want to win some item, this system will give you your best chance. I started using eSnipe years ago after forgetting to check up on an auction of something a really wanted right at the end of the auction. With eSnipe, you can just set it and move on with your life. It's always exciting to get that notice of a win when you weren't even thinking about it! Great for use at work when you might not be able to access eBay right at the critical moment. You don't need to use it every time, just on the important items.