Shaapit is worth a watch.
The good- Great songs, Good concept, good acting,especially by Rahul Dev,no vulgarity, quite a few thrills.
The bad-1 item song( something which should never be used in horror movies as it can spoil the essence of that genre), some silly scenes, amateurish acting on the part of some of the cast.
But like Phoonk 2 it should be watched ideally on the big screen else you may not appreciate the effect.
Surprising this was a flop. Donno what people expect. However it's much better than olden day horrors,that's for sure.