It's easy to scale and integrate, if you have the right design in place, but it could improve in areas like matching/merging capability, data export operations and data import operations.
I have been working on SAP Netweaver MDM 5.5 and 7.1 for the past nine years. I have done multiple end-to-end implementations with this product across various industries. I found this product to be best suitable for industries with a heterogeneous landscape.
The product is easy to install, configure, and use. A Windows-based user interface gives the user community a feel-good factor as they can relate to the user interface very easily.
It's easy to scale and integrate, if you have the right design in place. I have seen organizations realizing benefits of this product in terms of operational benefit as well as process improvement, data standards, and quality.
Having said this, the product still has some room for improvement in areas like matching/merging capability, data export operations, data import operations, and more integrated process for import (e.g. there is no concept of landing area, staging area etc). This can be looked at to take dependency from organizations having to install other EIM products.
Needless to say, I am a great fan of SAP Netweaver MDM products. I have seen SAP MDG as well, but I would still prefer Netweaver MDM over MDG.
Unfortunately, SAP is investing more on MDG these days as compared to Netweaver MDM and the roadmap also looks like Netweaver MDM is going to go away sometime in near future.
*Disclosure: I am a real user, and this review is based on my own experience and opinions.