I like many others I guess, I have tried different backup products, most have been OK but some pretty bad. The real test is on a full restore and most are woefully inadequate.
I was introduced to Datastor by a friend, he claimed the product deduplicated the data, meaning if the file or part of was already backed up, it only referenced the already moved data. On first use I was unimpressed with the speed and gave up with it. That was a big mistake, whilst not slow the first pass/backup was not fast either. It came into its own on subsequent backups, a full 12GB in 1min 8 seconds, 1.8Tb in less than 30 mins. If you have more than one PC it uses that already backed up data as a reference so to speak and a second PC backup with 1.2Gb of data only passed over 116Mb data on the first backup. So to summerise, it only backs up changed files and only parts of so it is super fast. It is also the only product that has done a BMR seamlessly so it gets a full 5 stars from me. BTW I introduced it to my companies IT department and they are to be moving over to it when an existing support contract runs out on their existing product.