The Synology products I've seen so far tend to excel in the ease of use category. I would be comfortable dropping a DS212 off at my mother's house and letting her sort the installation and connections. I couldn't say the same thing about the typical QNAP or Thecus products I've tested in the past. Those products are easy for TweakTown readers to setup, but nothing like the Synology DS212.
A large reason for that is the way Synology configures their software layer. The QNAP and Thecus products are more tech based while the DS212 is more laymen, like a toaster, you get a couple of dials and a big lever to pull before everything works exactly like you want it to. Users looking to go head on into technology bliss still have all the other options to fine tune their NAS appliance, but it isn't a requirement.
Del med dine venner