You really threw me off with the title of your post.
The calibration device is called the Spyder, not "Spider" and it's manufactured and marketed by ColorVision, not Pantone.
It looks like Pantone is merely reselling it just like other mail-order retailers do.
In any event, I have been using the Spyder for a time now, but not on LCD monitors because I have none, only on a CRT which is now my second monitor. The one I use now but bought later came with its own calibrator hardware and software. I can vouch for the fact that the Spyder performs very well for its price. Certainly the EyeOne and the Monaco device perform even better but are more expensive.
If you do get a Spyder, I recommend you don't get the bundle your link points to, as that one comes with the PhotoCal software and you really want to go with the higher-end OptiCal software from the same developer. Bundles of the Spyder and OptiCal are also available at a higher price. OptiCal is worth it.
Before buying one, see if you are satisfied with SuperCal (shareware, free download).