The maintenance requirement depends on the size of the deployment. If the product is used to serve a very large enterprise-sized organization with many users, 15 to 20 people are required to take care of the maintenance. If 50,000 is the product's user base, there is a need to have four to five people to four support the product.
The product's integration capabilities with other solutions can be described as a straightforward process that the tool offers. As long as the application exposes some kind of interface, SailPoint IdentityIQ can integrate with it.
The tool's GUI is user-friendly.
The product requires one to invest in maintenance, upgrades, and other such areas. If it is a small-scale business, I usually suggest SaaS-based systems to such companies so that you don't have to take care of the maintenance. Medium to large-sized businesses can choose SailPoint IdentityIQ.
I rate the tool an eight out of ten.