If you're on the fence about trying a burr grinder, take the plunge with the Infinity, you won't be sorry.
Positive Product Points
Price! Extremely fine and even grind. Enough steps for me to get it dialed in to make excellent crema with beans that aren't anything fancy. Very easy to open and clean. Did I mention the price? Huge step up from a blade for relatively little money.
Negative Product Points
If you need to "dial in" the most specific grinds, this may not be the machine for you. There's some play between the steps and I can find only 13 or 14 steps, not the 16 claimed. You have to reset the grind every time you open the grinder to clean it, which should be pretty often. A fair amount of grounds are left in the burrs after grinding.
I'm using it with a Francis Francis X1. It grinds fine enough to choke my machine even backed off three steps from it's finest super fine grind. Backed off 5 steps from the max it allows my X1 to make excellent crema and great tasting shots. You have to "re-step" the grind setting every time that you open the machine up which should be often as it leaves about a teaspoon of grounds in and around the burrs. Perhaps this grinder isn't perfect but it offers unbeatable convenience and consistency at this price point. I'll admit that I buy supermarket beans, Cameron's, and the Turkish setting on the store grinder always required some regrinding at home to get good crema. With whole beans, my flat blade Krupps required three 11 second grinds with breaks inbetween for scraping and mixing. No more!
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