Unitrends good but, in my opinion, pricey and sales can be aggressive.

Using two of the appliance local backup devices with 3 Tb capacity. these two devices have worked well for a few years. the biggest issue I am having now is that the ability to increase storage in basically non-existent. In my experience, you either pay a rather large fee for new device or pay for a rental unit hardware rental is not my desired format. i have never had enough capacity to make full image backups so I have had to look for another format. I will still continue to use these as a instant short term storage of user data that may need to be restored from a few weeks or months past. i have only had to contact support 4-5 times over the years but the cost of support is rather high from my experience. the push to purchase new SASS or hardware is at even higher premium for a small company.