In kolkata should i go for a more convinent ipcc coaching center like eten,edmiron and edzonex or go for spread out individual teachers ?

For ipcc is coaching centers like edzonex, edmiron etc good or could u plz suggest a best one roof coaching center or should i go to various teachers like bacahawat soi etc spread accross kolkata ? one roof coaching centers are convinent but new while individual teachers are far and experienced ?