Another Crash Plan user here. I"ve used Mozy and Backblaze in the past, and so far, I've been happiest with CP. For me, when Mozy upped their prices, I had no choice but to leave. Backblaze was great until there was an unrecoverable error with my data at some point. No one could tell me why it happened, and there was no way to get it back. I googled and found that it was a common error. So, since I was starting my back-up over anyway, I decided to try CP.
I've been with them for almost a year now and I've had to recover some individual files. I found the process very easy and was super happy to see that they still had things stored that I had deleted from my computer as much as 3 months prior.