In terms of security it is even better. The shopping cart is PCI compliant so you don’t need to worry about your client’s data security. Additionally BigCommerce takes care about your data safety (hacker deterrent security provisioning, three redundant network architectures and hardware firewalls). So, you can be sure that no one will hack your web shop.
Finally, since BigCommerce is a hosted solution it can boast of highly intuitive and simple to use admin panel that makes establishing a store as simple as it possible. No programming skills are necessary and you can concentrate on making money. However, if you feel yourself comfortable with programming, check BigCommerce API.