Very good NAS at an affordable price
The NAS works very well. No problems whatsoever in the 4 months I've had it (no reboots required or anything). I find the speeds quite efficient.
The interface is perhaps a bit cluttered, I would have preferred a simpler and more permissive system (but no doubt I like tinkering, for Mr/Mrs Everyman this is surely better).
I'd recommend it, but of course I don't think you can really evaluate this kind of product until it's been around for several years.