Our company bought 8 of the nice space explorers. I think only two of us are still using them. No e-mails about taking the extras please
I use my 3D mouse daily but only for specific tasks. About 5% of the time I am doing CAD, I use the extra mouse.
For CAD at Robotics I would find a better use for the money. That extra $150towards a better graphic card, larger monitor or more RAM would help the CAD computer more than the 3D mouse.