The ability of managing multiple containers simultaneously in one instance with ease, which makes it easier when working from home or at remote locations without access to an office environment.
I dislike that you cannot have more than 5 instances running per account; this can become quite costly if your organization has many users who need additional resources available as needed throughout business hours (or even during weekends). It's very easy using replication services offered by replicantioin service providers like replicated! This allows us to keep our servers up 24/7 while ensuring we don't run out capacity too quickly due to spike demand.