Synology works reasonably well, but is not setup and forget.
A few months ago, I decided to migrate to my new laptop by restoring a backup from the old one , just as a way to test the DS216j backups. I found:
a) I was on an old backup solution of them, and they had migrated to something new. I had a hard time to find the old backup software's installer to do the restore.
b) The old backup was good enough to restore individual files, but had no real way to do a full restore. It seems they thought I'd click on each individual file, even if there are hundreds of thousands in my home folder. I believe there was an option for zipping a folder, but it just timed out.
c) Their site had great documentation for telling me about how to do backups, but I could not find anything for the I-urgently-need-a-full-restore use case. Maybe I overlooked it, or their new software is better documented.
Now all the data was safely on the NAS, and I think I could scrape it out with a few days work, but none of the above would be fun to find out in the middle of an emergency. I've since thrown their backup software out and replaced it with a custom rsync to the NAS. At least I know how to deal with that when the full cow farm production hits the turbofan.