The most valuable features of either of the SRM tools, were the reporting and real-time ability to show management that additional storage was required or in regards to who was using what storage and bandwidth.
All the attributes of the tool had real importance, when you needed time to create some reports for the management and to email those reports on a regular basis.
By the time they rolled out its predecessor SMC and Unisphere, the old ECC was trying to do too much within a large enterprise environment.
We were unhappy as no one from EMC heard our plea for assistance and it became expensive in terms of the license and the amount of resources it took.
Simply put, in the past the vendor support model was not broad enough to ensure every aspect of the ECC product worked efficiently.
After a few years of waiting for EMC to apply the fixes we wanted they were finally all addressed.