We have 40 iosafes for our stores and 2 DS2413+ for our corporate office to manage the other diskstations as well as back up our other servers. While we dont see too many problems from them, the times that we do, it is crippling since the diskstations are being used as server backup targets.
DMS is easy to install and use; Quick to get started and set up almost anything you need
Complete lack of support; I have put in 4 support tickets so far and have only heard back from 2 of those; Of those 2 they took at least 72 hours to get back to me; Although they offer a support line, they will only ask you to put in a ticket with no escalation procedures.