Not to go on and on about the web interface- as much as I dislike it, I digress. The N0503 is packed with features, and it is flexible. The N0503 is fast- there is no doubt about that and even in RAID 5 it manages to sustain some excellent numbers. For a three drive NAS, or five 2.5? drive NAS the N0503 happens to fall into the more expensive side of things, but alas is the nature of performance hardware.