I've tried BargainBin, AppSniper, Pandora Box, Appminer, and Store Extend. I have to say that AppSniper is the best of this group, though it does cost 99 cents.
I've kept coming back to AppSniper because it was the only one I had tried that keeps track of what you have already seen and only highlights the ones you haven't seen. It performs much better in its most recent version too.
I will try some of the others mentioned in this thread. I've discarded PandoraBox and AppMiner because they don't keep track of what I have already seen.
I got the update yesterday as well! For some reason though now, whenever I open BargainBin, no items show up unless I refresh it again. Has that happened with you?
Bought Appsniper yesterday as this thread made it sound pretty good.
Woke up today to find it had been updated (yeah). Already found an app I wanted that Appsniper showed went on sale (that saved me the cost of Appsniper in one day). Pretty darn happy.