I tried surebackup, don't like it, At first it was marketed as "Instant Sandbox" to which that was a flop cause the about of "re-hydration" (Going through incremental, depending on what point in time you are building your backup test from) which was terrible as soon as you had a couple dependent VMs (AD, SQL, Web Front ends). Went from "Instant" to "Hours" with terrible performance.
So then it just became Surebackup to ensure the backup files could indeed do they job, again generally I find it hard to very a bunch of these VMs that they indeed come up correctly as they have login dependencies on AD for a lot of their services. I have yet to have any of my backups not work, unless the backup job itself clearly failed, other than that I find the amount of resources required to run these isn't that great. Also note I did these tests with an All-in-One Veeam server, which currently resides on one of our production hosts, but have since built a standalone (Not in my production HA Cluster) that I can move this backup VM to, this host also runs our entire test enviro (which is currently made of restored VMs from my backups running on it's own direct storage) this reduces any load on my production hypervisors.
Sorry, just had to get my rant about how much I dislike Surebackup... had nothing but problems with it, and if you cover the fourms many other experience the same type of annoyances I did. Just had to express my dislike for that feature. To top it off it's the ONLY feature you get with enterprise, if you want any of the good stuff (Storage integration (snapshots), WAN accelerators) you have to get Enterprise PLUS. Marketing, phhhhh.