To start with, the title of the movie is completely misplaced (though the title song is refreshing and lingers on your head for a while).
Multiple stories are weaved around saving "Lucky Cafe" and thrown in are candy-floss romance, marital discord, organisational structure tryst, corporate greed in the garb of modernisation eventually culminating with court-room scenes (read that "a secret that opens up can of worms"). In a nutshell, there is something for everyone.
If there is a single reason you were to watch the movie then let that be Nana Patekar. He breathes life in the character of Subramanyam. Next is Dimple Kapadia who hogs the lime-light as the Parsi lady (after "Being Cyrus). Vidya Malvade essays the teacher of "Main Hoon Na". She has a strong screen-presence however appears too posh for the role. Anjana Sukhani (the Juhi Chawla of the decade) does a decent job. Rehan doesn't come across quite striking, though gets brownie points for getting his accent right. Sunil Shetty was completely miscast. His role has many layers and a seasoned actor like Irfan Khan or Kay Kay would have pushed the envelope. Raghav Sachar was wasted.
Writing is good, at least in major parts. Manages to weave multiple stories into a single thread. The subtle humour is interlaced very well with the drama. The court-room scenes seem slightly OTT, but can be safely ignored. Songs are hummable and should catch on with the youth. Kabir was appalling in his first outing "Popcorn Khao! Mast Ho Jao" and he redeems himself with "Tum Milo Toh Sahi".
Indeed, it a feel good movie of the year.