Not a masterpiece, but definitely a friendly and entertaining movie. A tad slow perhaps, but not enough to make it boring. Someone described it as "cute", and that's an excellent description for this one.
Except for Shreyas Talpade and the great Naseeruddin Shah (the latter only in a very short guest appearance), all roles in this movie are played by less-known actors. Nevertheless, they perform their tasks very well. Shreyas is both convincing and entertaining as Shankar. Lena Christensen's role was perhaps not a hard one, but she does a decent job nonetheless. Most of all, however, I enjoyed Vijay Maurya in the role of a rapping gangster who deep inside isn't that bad at all, and Manmeet Singh, who for a change plays a bigger role than the occasional taxi driver. I surely hope to see more of both gentlemen in the future. All in all, a well-chosen ensemble cast.
The story itself holds the middle between a road movie, a love story and a comedy of errors. Nothing special really, but good enough for an enjoyable movie.
As for the music, usually I admire the work of the duo Salim-Suleiman, but Bombay to Bangkok is definitely not their best work. The background is okay, but the songs hardly worth remembering. Besides, they don't really seem to fit well within the movie. But criticism aside, Bombay to Bangkok is a nice and entertaining movie, and there is no harm in watching it one time.