System & data redundancy and graphical access without sacrificing performance - like having 24/7 hardware & system support with quick response time, but without the hundreds of dollars of extra monthly charges.
Stability: Easy, powerful & stable - doesn't require re-booting to maintain performance levels. System uptime measured in years.
Security: Linux is regarded as one of the most secure operating systems. Linux allows consistent rule-sets to be applied which greatly reduces the ability of viruses and other exploits from getting a foothold in the system.
Internet Friendly: One doesn't have to give up graphical for security.
Scalability: From 1 to 20+ users and maintain the performance that is expected.
No Surprises: A no-hassle system because SRS updates all drivers, patches, and software without pharmacy intervention.