Hi I have not bought or used refills yet, but I am going to. I have a friend who buys his refill kits at staples and he said that they work fine. I found this on the net. It is cheaper than what my friend pays. He is going to check it out. You can look at it to. go to < http://store.yahoo.com/youcansave/uninrefkit.html> I hope it help all of us. Vern