Spyder, Pantone Colorvision worth a try?

I was going to buy an Eye-One Display 2 monitor calibration device but I was just given a Spyder, Pantone Colorvision device (that's what it says on the box). I'm not sure what version it is or anything else. Wondering if it is worth using or should I just buy the Eye-One Display 2???

Any advice would be helpful.

I've used the Spyder 2 successfully on PC's... just waiting for it to catch up to me to test it on the new Mac.

As you've been given the Spyder you may as well try it see how you get on before laying down more money on the Eye-One device.