Right, since everyone backs up now (right? ), what have you all used and what do you think i.e. pros/cons? I'll start things off with a few I've used recently:
Cobian backup:
I've been using this for some time to back up to a NAS and it's been pretty solid, but the need to create >500MB shadow copy snaphots for every individual task is less than ideal when using an SSD. You can run it with that feature disabled but then it won't even attempt to back up open/locked files.
It's very customisable and has plenty of features but I feel some of them could be better documented. Also the encryption feature is nice and supports asymmetric encryption but it's not terribly fast and the implementation is an unknown so I wouldn't rely on it for anything very private.
Overall it deserves a lot of praise and I'd recommend it, but I'm looking for something else to avoid having to use VSS for locked files.
Spideroak
I've not been using this for very long but it looks like a great solution for smaller amounts of data. They use a zero-knowledge encryption method, i.e. client-side encryption so they never have access to unencrypted data, unlike others like Dropbox who have been quite misleading about their policy and royally fouled up when they let people sign in as anyone and access their files. The software also handles locked files much better than using VSS IMO.
However, there's no simple way of purging older copies of files which may or may not be a problem, but if you have some fairly large, frequently-changing files, they will eat through your storage pretty rapidly. One way of avoiding this is to set the backup schedule to daily instead of automatic, but there's no option for anything less than daily e.g. hourly. The software also seems a bit clunky and has crashed on me a few times when I've been a bit heavy-handed with it.
I do rate it highly though, it's just a pity you can't use the software to do backups to LAN.
Windows Backup
Well I've not had much experience at all but unless you buy one of the overpriced versions of Windows, you can only use it to backup to local disks which makes it near useless, for me anyway.