Nothing really - just that it's good to have more than one option when managing your accounts in google apps. I use this mainly because of its simplicity compared with other tools available out there but sometimes you're forced into using an external program if required functionality is not present within gapps manager itself. It works well enough so far though i haven't noticed any problems or bugs yet. If you are looking for something simple then go ahead otherwise look around! We've been able to set up separate teams easily without having to create multiple instances each time we want new groups created which was previously necessary as each instance used different credentials from another account and only worked sporadically at best.