Conclusion: The Netgear Centria delivers only OK performance as a NAS and a router, but the fact that you get both in a $300 device makes it a decent deal. You are certainly not going to find more granular router settings with any other device of this type on the market, not even Apple's Time Capsule.
Pros: Router and NAS in one device. Dual-band router. 2TB of storage. Advanced router features.
Cons: So-so NAS and router performance. Buggy management apps. Inconvenient design.