The units that we have deployed have been rock solid for us. Backups run like clock work on these devices.

The support has been phenomenal for us. If there is an issue they fix it in a timely manner.

The only downsides at this time are that there is no file exclusion on the device and if you have a site with lower bandwidth it doesn't backup to the cloud as well as it should.

Side note: This will backup an iSeries which is HUGE!!!