What is Salesforce biggest competitive advantage?

Jobscience is a native application developed on Force.com and delivers our staffing and corporate customers the following key benefits:: #1 PROVEN:: World-class data centers with backup, failover, disaster-recovery, and an uptime record exceeding 99.9%. #2 SEAMLESS & EASY INTEGRATION:: Being a platform as a service, force.com allows corporations to extend their Jobscience experience via AppExchange Marketplace (2000+ Apps) and published APIs. Users can then leverage the platform's single reporting & dashboard engine to analyze data across multiple apps. #3 INNOVATION:: Jobscience customers gain the added benefit of salesforce.com's R&D commitment to innovation (in 2014, salesforce.com invested $623M in R&D), including but not limited to built-in social collaboration, native mobile framework, and platform-as-a-service architecture. #4 FLEXIBILITY:: Jobscience customers continues to speak about the flexibility of the force.com platform as it relates to high configurability of field labels, page layouts, workflows, and triggers.

Thanks Bennett for your response to my post. This has been very helpful.