I've been using Dropbox for many years, and would have gladly given them a four or more, up until last year. I pay for a premium service, but definitely didn't get it. Somehow I lost some crucial data, but wasn't worried as I knew Dropbox had a roll-back feature, which was part of my premium subscription. So I went in to use it and guess what - it didn't work. Argh!!!!!I got in touch with support and they tried to help, but couldn't. In the end, I managed to get something back, which wasn't as up-to-date as I wanted, but just had to make do.I spent the next few weeks arguing with Dropbox about having to pay for a feature that didn't work. I figured a bit of a credit on my account wouldn't go amiss, but they refused point blank. They REALLY didn't care.It became one of those points of principles where I just wanted them to concede that features that people are paying for should work. If they don't work temporarily then that be accepted, but I ended up being able to send them screen shots and videos clearly demonstrating that this premium feature didn't work. They really didn't care.Then, a few months later, I needed to restore another file. And guess what. It still didn't work as you'd expect, so all that time had gone by and they still haven't fixed it properly.So, alas, like many other people it seems, I am now looking to take my custom elsewhere, as I am worried that there may come another time when I need to rely on Dropbox to recover data (that's one of the main reasons for Dropbox, right?) and it will fail to deliver again.