It depends Swati, if you are planning to start working then you may. Few babies how much ever we try will not take bottles. Mine never took so for me it's waste of money.

Yes they are a really beneficial option especially for working moms. It saves effort of new moms when they need to focus on their own health too. Being a user, would suggest to go for breast pumps sessions in between your regular breastfeed sessions to provide the required time for your health too. It also helps in expressing more milk for your baby. Can easily store n feed later on demand.