If all you ever hear is how good someone's software is you're probably talking to a salesrep.  If it is that good make sure that same salesrep is working on your implementation!  If not, why not?

To assist in an evaluation as important as yours, you've got to speak with consultants who have many real life experiences if you are going to get any value.  They also must be MOTIVATED.  How motivated is a person going to be when they are billing you by the hour?  On an evaluation, the salerep is motivated because they are on commission not on the implementation!