What do you like best?
SAP has always focused on coupling all different modules into a single suite and that is why they are popular. It is the same with SuccessFactors - a suite capable of handling all the major HR solutions starting from management of employee master data to performance reviews. SuccessFactors is huge with so many things combined to one single suite. The best thing would obviously be the integration of so many different things in a single suite.
What do you dislike?
Often the best part about a suite looks bad at times. Although it is vital, the suite is huge (as I said earlier) making it a bit complex at times. So it will take some time to understand all things which is carefully displayed based on role based permissions. Other than that, some custom developments are hard to beautify which I think SAP will take care in the upcomimg releases.
Recommendations to others considering the product
There are a very few suites in the market for an overall integrated HR solutions. SuccessFactors by SAP is no doubt the best among them as it is very tightly coupled with all the necessary functionalities and many more to come.
What business problems are you solving with the product? What benefits have you realized?
At present, I'm taking care of the Performance and Goals Management (PM GM). There are plenty of benefits to say the least. In PM GM, there is a lot of scope which includes streamlining the entire appraisal process. Custom categories, goal definition, group goals, cascading the employee goals to achieve the manager's goal, ratings, automated 360 reviews are some of the benefits that I can point out. There are a lot more though.