I'm very impressed with this product, it does exactly what it says it does, it calibrates your screen, keeping a careful virtual eye on the ambient light adjusting your screen to accommodate.
Having used another calibration tool for a year (the standard Huey) the one thing I am really pleased with is how the change in the brightness of the screen is handled, it doesn't appear to jump as quickly, making it far less distracting whilst working on a photograph.
I would recommend this to anyone who cares about what their images look like, and it makes a good starting point for designers. Those who wish to can upgrade to the Spyder3 Elite. Which is well worth the cost for the extra features.
The "small" things that let the product down are:
* The counter balance for the screen calibrator has no instructions on how to use it. It is quite simple to adjust by simply gently but firmly pulling the weight that it close to the USB plug, but if you have just spent over a ton on this kind of product, you are unlikely to want to be pulling on wires, the manual should cover this, or at the very least a small sticker on the weight itself would have been pretty easy to produce!
* The software doesn't seem to recognise and iMac in the list of options, which considering the kind of market this is aimed for seems a bit of an oversight, LCD is the best option to go for, but it should really list these models separately, even if it is a duplicate set of settings, it would be much more user friendly.
* The sucker cup simply didn't work on my screen dropping off after about a minute, reminding me of one of those pop up sucker toys from my childhood, except they didn't cost as much as this, I found this pretty useless and not worth the bother, the counter weight works better.
Overall a good product, let down by some silly oversights, but has a decent 2 year warranty and checks for updates automatically. These complaints are small, the product is well worth investing in!
The only other thing I would like is an option in the Spyder3Utility to turn the calibration off and on more easily.