Live there myself, so no :thumbsup:
The only thing I can think of to recommend Haywards Heath over Burgess Hill is the mighty fine Nizam restaurant.
HH thinks of itself as a fairly big town, yet has the worst shopping centre in the South. Even similarly sized places like Horsham and East...
Re the Mid Sussex places mentioned...
Hassocks- has the advantage of the station, has Downlands school, which is excellent, ten minutes from Brighton or forty from London, straight up and down the line. Not exactly a picture postcard village, and the shops aren't much, but you can only expect...