I'm not Dieter, but I can tell you my experience with Crashplan. I used Mozy for years at home and work (free edition at home, enterprise/corporate at work) and I think it's still churning away on my wife's laptop (note to self, remove mozy from laptop). I only had the free version at home, so I was limited to 2GB which is used for only my most essential files. Uploading took forever, even for 2GB, but once that was complete, it quietly ran in the background. It saved my bacon at least once after a late night file move resulted in me deleting both copies of a certain folder full of somewhat important files. So, I learned the benefit of online/offisite backup with versioning. However, it wasn't enough to do all my pictures or my growing family, so I was considering going the pay route for unlimited storage. Upload speed was still a concern for me, especially considering expanding my usage to more like 50-100GB and restoring that amount in the even of some cataclysm would be an eternity.
Then, I started using the corporate version at work. Let's just say I'm glad I hadn't signed up for a year of the home version. I had nothing but problems with Mozy at work and I'm not sure I ever got a complete backup (only 5GB total files consisting of .pst, excel, word docs, pictures, etc.) before I left last year despite reinstalling and opening multiple tickets with support. I knew I still needed backup, preferrably something offsite and cheap, so I rolled my own combo of mozy for the same stuff I had been using and foldersync for files (I think it's call live sync or mesh or something - it's still around in some form). Essentially, I was now backing up critical files and synchronizing two folder sets between my house and an external drive I had installed on my dad's computer a few towns over. I liked the convenience of being able to "seed" my initial "backup" (just a sync, really) so it wasn't an eternity and since it was my own storage, it was cheap (cost of the drive) and for the most part automatic. However, it wasn't a backup, as I discovered more than a few times. A sync is just that, so an accidental delete or overwrite on a file was replicated instantly on my other drive across town. Not great.
Enter Crashplan about 4 months ago. I haven't looked back. I'm still only using the free version, but I have set up my own little backup network between home, work, my parents house. I have an external drive hanging off my WHS at home and the backup server at work that backup up to each other and a partition on the hard drive inside my parent's computer. So, Home backs up to work and parents, work backs up to home and parents, parents back up to home and work. On top of that, I have my sisters both backing up to me at home and my father in law backs up to the server at work.
It hasn't cost me anything more than some storage space I wasn't really using anyways and I can sleep a little better knowing my family has their files backed up - because I would be the one they call with a hard drive crash anyways.
It has great features for sharing space with friends (encrypted, quotas, schedules, etc) and if you want to pay (I couldn't quite convince my family to split the cost of a family plan with me) you can get unlimited storage for up to 10 computers for I think $10 a month. You can use network drives, external drive, online, friends, family, etc. to store your data, and you can seed a backup if, say, your friend lives across the country, you could both buy external drives, fill them with your initial backups, ship them to each other and have a backup that way. If you house gets destroyed, computers get stolen, etc. you can just have your friend ship back your drive and you won't have to wait forever to download all your data again.
Ok, that's enough - suffice to say, I like Crashplan a lot. I should probably consider paying them for their outstanding product....
i7-6700K | Z170X-Ultra Gaming | 32GB DDR4-2400 | EVGA GTX 1080 | 512GB 960 Pro | 27" Dell 2560x1440 Gsync | Nanoxia Deep Silence 3 | EVGA SuperNOVA 550G2 | Win10 Pro x64.