Question : I run a retail store and I am planning to : 11290

I run a retail store and I am planning to get a Point of Sale system. What are the advantages and disadvantages of POS system and how to rectify it? What are the best POS system for my fashion clothing store. Which one to opt in the below systems

1. Vend - https://www.vendhq.com/

2. Securebox POS Security - https://goo.gl/6QRTtd

3. Bindo - https://bindopos.com/en/