Synology offers a couple of plug-ins on its site which could prove useful, too. One of these is the Mail Station add-on, which enables the DS410j to work as a mail server. Combined with the built-in DDNS server this makes it possible to host your personal email from the DS410j, which is pretty nifty.
Similarly, the built-in iTunes server can be supplemented by its SqueezeBox equivalent if the former isn't of much use to you. Better still, these are just the official apps; because the DS410j runs a Linux kernel, if you're feeling savvy enough you could build your own application to run on the device - an action encouraged by Synology.
In that all important area of transfer speeds the DS410j proves itself admirably. Using a 1GB-odd file ('source materials.gcf' from my Steam folder if you must know) I recorded a 28.7MB/s write speed and 48.3MB/s read speed. Obviously that doesn't make this the fastest NAS device in the world, but it's in line with its competitors, which is as much as can be expected realistically.
There are no complaints elsewhere. The media server functioned as expected, picking up new files and streaming them to my PlayStation 3 with no issues whatsoever and iTunes on my PC had no problems playing files from the DS410h's server. That this NAS device works just as well as (if not better than) my ReadyNAS NV at a third of the price just goes to show how far we've progressed in the last few years.
The Synology DiskStation DS410j isn't just feature packed, nor does it just offer great performance. Rather, it does both of these things at an affordable price point and that's certainly worthy of accolade.