I think as compared to market price Zero-B is very highly priced as of now Zero-B is importing all of its product they are not manufacturing it what I have checked inside.
It the materials they used are not repairable and the cost of the company products as you can say the pump which zero-b sells around 3500 at its mrp but in the market you can find it a very special price around 800/- only and also they dont gic\ve any warranty on membrane so I think its not value for money