I had an adventure warrantying my original Intellimouse Explorer from them. I phoned them up gave told them what's wrong, told them the part #, they gave me a case # from which I can check the status on the internet. After a couple of weeks I checked my status on the internet and for some reason it was cancelled. So I phoned them up and they told me that the part number i gave them had expired so they didn't send me a replacement. I was pissed and couldn't understand what they meant. I eventually figured it out and the problem was that they had replaced the original Intellimouse Explorer with the new version 3.0, which had a different part number. I couldn't believe that they couldn't figure out to just send me the 3.0 version instead of cancelling my case because they no longer made the original Intellimouse Explorer. Like it's so obvious what the solution was, I was dumbfounded. I actually had to phone them back to tell them to send me the 3.0 version. What a bunch of idiots they have in their RMA department.