I like UTIPI (Unified Tiered Infrastructure Per IOPS) feature in billing. 

Another feature I like is the life cycle management that helps me with data storage efficiency. 

I like that there is no storage limit in Scality RING.  There's no inherent storage limit. Even big companies with many users can reach the practical limits of the system.  

The most valuable feature of Scality RING8 is its performance and good interface.

I think it's the economic factor. This solution has the lowest cost for storage systems.

S3 and CDMI, restful API for object access, are useful for deploying standard S3 or CDMI-based applications such as cloud backup, email.

Erasure coding technologies permit to reduce storage costs by providing the same security as replication but with less storage resources.

Scality permit to deploy a data/metadata ring on 2 sites, a specific DRP ring on a remote site.

Each ring can have its own QoS (Rep3, EC,…) in order to provide application-based SLAs