This may be a dumb question but I have to ask it. I have read where several members and MXT owners on other forums have mentioned how much they like their MXTs. They go on the say how they have owned many MXTs through the years. A recent post in this forum makes that reference,so my question is..... If these MD last for years why is it that some have bought several MXTs through the years. I understand some will say because of the upgrade, but honestly, until the PRO came out they are basically the same.