Has anyone heard of this OPK?

I read about this OPK in MX on Friday and came home to google it.

It's called DuoFertility and is not yet available in Oz. It is available in the UK - DuoFertility | The most accurate, convenient and reliable personal fertility monitor on the market. Although it's quite pricey, they are offering a money back guarantee if you are not pregnant within 12 months. I don't see any carve out for those who have already tried IVF or limiting this money back offer to those under a certain age. Here's the offer: http://www.duofertility.com/summer-o...rms-conditions.

Have you heard of this? or Know anything about it?

I might try to find the UK members thread and post this in there as well if that's OK with the Mods.