Note it says 'Up to ± 0.1 mm'

What people trying to sell their product claim and reality are often very different things, if you have a search around the web there are people who have used it and were only able to get a much lower accuracy. If it is good enough for your needs that is great but I would test it first on the most demanding things you will need it for. That said if you need portabl to offer it as service and are confident it can pay for itself that is different to an investment that will only be used inhouse.

I was refering to 123Dcatch when I mentioned doing it for with an iphone btw, have you tried that to see if it is any good?