I have used this one for a few weeks, several months ago. At the time, there were 2 main issues:

* The food selection was too US-centric - for example, where I live items like sausages tend to have a different nutritional content compared to their US counterparts. I think these types of food should have localised versions.

* Weird portions once you select Metric: for example there were a lot of foods where the default quantity was 28.34 grams - I suspect because that's an ounce in the US.