Fine, straightforward fare, but have you seen this before? (Spoilers) This is a sumptuous banquet of beautiful locations, good acting, a lovely soundtrack by the legendary A.R. Rahman, and it plays out more-or-less the way you would expect and want it to. The actors know exactly what they are doing, particularly Helen Mirren and Om Puri, who both start out bombastic and brutal but let their guards down convincingly.
However, as some people have noted, the most surprising thing in 'Hundred-Foot Journey' is its very great resemblance to the 2007 animation 'Ratatouille', with many themes, scenes and even one or two lines bearing an uncanny resemblance. For example, Hassan is basically a composite of Ratatouille's two main characters, awkwardly falling in love with the rival female sous-chef while also becoming a rising star of the kitchen with his unorthodox cooking style, delivering a dish for a critic which is vital to preserving their good rating. On a personal level, the scene where Hassan tastes the sea urchin in the market in India is very similar to Remy's tasting of the various cheeses, both finding a moment of clarity and epiphany, suddenly knowing for sure that their destiny lies with food.
Other themes too, such as outsiders feeling they should never mix in each other's worlds, then discovering and accepting the advantages of integration, are present in both films. (It is perhaps possible that the writer of Ratatouille wanted to explore immigration, integration and racism metaphorically, whereas Hundred-foot was more willing to deal with it directly.)
While many children's films are adapted from serious grown-up works, it is downright bizarre to see this happening in the other direction. It isn't a bad thing though, Ratatouille is good and worthy of influencing others.
(And before anyone mentions it, the novel that 'Hundred-Foot' was based on was published in 2010, three years after Ratatouille's release in 2007, so Ratatouille definitely came first.)
On the downside, though they're not carbon copies, it is very hard to shake the feeling that this is a live-action remake, and consequently anyone who has watched Ratatouille is going to find very few surprises or twists in Hundred-foot.