Smilo baby bottles - anyone used them?

Laura

Has anyone used the Smilo baby bottles? This is directly from the website of what it's supposed to help; Engineered to create a natural, uninterrupted flow that fends off colic, gas, ear infections, and other pint-sized problems.  If you have used them please let me know what you think of them. I'm really interested in buying them but would like some reviews on them first