We use it for our VM backups. Generally very competent, lots of options and works fairly reliably - we get the occassional failed replica, but generally reliable. The replicas are run every couple of hours and we have a couple of failures a month (usually server timeouts). Like every product, it has its foibles, but I'm generally impressed.
The Veeams go to a second backup server room (separate building) at regular intervals during the day, then backups are generated and written to tape every day.
Fan? No. But it is a good and competent product
Signed NOT K.