Summary: The QNAP NAS devices use mostly the same firmware, if you like one you'll like the others. Features that actually separate the models come in the hardware and the (storage) expansion options. We already knew the firmware is easy to use and full of features, there wasn't a doubt there. So what kind of actual improvements does the TS-509 offer?
The TS-509 uses far more powerful hardware which improves performance over the previous generation a lot.
Pros: High performance, Feature rich, Easy to use, Built-in power supply, Plenty of external connection options, Highly moddable, Configurable without PC
Conclusion: Benchmark Reviews believes that manufacturers should be educating consumers with their product packaging, so they can make the most informed decision possible. This is why we ratie the retail package presentation. in terms of the TS-509 Pro NAS this rating is somewhat high because QNAP has done an excellent job of informing buyers with plenty of on-the-box specifications and feature information.
Pros: Extremely powerful NAS product, 64.0/68.3 MiB/s Gigabit Ethernet read/write performance, RAID-0, 1, 5, 6, 5+Spare, Single, and JBOD disk configurations, Dual Gigabit Ethernet NICs with teaming and failover safety, High-quality durable metal enclosure, Elegant appearance without functional compromise, No wiring need; SATA and power on backplane, Five total High-Speed USB 2.0 ports, Simple HTML administration interface, Frequent firmware development and free software su...
Cons: Does not offer Jumbo Frame functionality, Basic web interface compared to competing options, QNAP does not offer a local US support telephone line, Integrated PSU could cause trouble if replacement is needed out of warranty, Package includes obsolete CAT-5e Ethernet patch cable
Summary: The QNAP TS-509 Pro comes highly recommended — it's a highly flexible NAS with an interface that's gaining usability as time goes on. Its weak point is in its add-ons — the Multimedia and Download Stations could do with a complete rework.
Pros: Slick NAS admin UI, Highly featured, SMS alert support, High transfer speeds
Cons: Cheap display on the NAS, "Stations" need to be overhauled