What do you like best?
Give a simple and efficient storage for your organization.
When you share data with another user of ownCloud, these are not subtracted from storage, as in Dropbox.
You can connect an existing LDAP and avoid having to manually create hundreds of users.
You can connect other local or new storage services (NFS, SAMBA, Dropbox, Drive ...) and manage them from ownCloud
Apart from the storage, it is possible to manage contacts, bookmarks, collaborative edition of documents, and many other things, all through a complete plug-in store
What do you dislike?
The software version changes are not trivial. They require research and tests
An update without planning could cause damage or service drops.
The mobile client is not very pretty and lacks many features, speed and ease of use that its competitors have.
Recommendations to others considering the product
It is necessary to maintain the infrastructure.
The advantage over a business plan like Dropbox is obvious. There are no monthly payments, you control your data ...
But in return, you will have to set up your own infrastructure (servers, network) and you will need someone to administer and maintain it (maintenance, updates, security)
What business problems are you solving with the product? What benefits have you realized?
Manage the storage of a research department.
Centralize the use of the cloud and centrally manage backup copies
Integration with other pieces of free software, such as LDAP