This review is wrong. It says: "the service offers 1 GB of storage with limited features free of charge, while 30 GB are priced at 9.90 Euros per month." Not true. Those are the DAILY LIMITS FOR PUBLIC TRAFFIC, i.e. how much can be downloaded by other people you have shared links to your files with. The actual storage capacity is UNLIMITED, which makes this far better value than Google Drive and others.
Personally I don't think the threat of a MegaUpload-style takedown is significant either. Surviving services like Rapidshare have been careful to take legal advice and tinker with their systems to avoid this. While they may be required to take down individual files or close accounts of certain users who seem to be abusing the system, it is unlikely that the service will disappear for legitimate users as it did for MegaUpload.
In any case, you are never wise to rely only on Cloud storage. It should be a vehicle for making files portable and accessible anywhere, and for backup of what you have on physical hard disks. In that case, if one day it does disappear you'd have to be very unlucky to suffer a disk crash the same day before you've had chance to make another backup elsewhere.