The desktop itself really deserves 5-stars as technically it's usually ahead of the game. Sure most recent 1-star reviews are for the terrible (non-existent) customer support and quite rightly, that and the price increase.But for me, the mobile app is terrible, REALLY BAD - they can't be forgiven for a serious bug which means important photos you take when on holiday (aka roaming) will NOT get backed up. It's a BUG, and not a "feature" as they call it to block uploading on 4G when in Europe 4G is faster and free compared to slow & expensive Wi-Fi.So keep that in mind, you can NOT rely on Dropbox, FACT. AVOID the mobile app if photos are important to you whilst on holiday or touring another country - just when your photos are probably the most important you've taken!
