The ease of creating groups, being able share files easily with others at work or school (and vice versa), using it as my primary means for communication outside from gmail when I'm not home/mobile etc - all very simple! Nothing really specific but maybe make notifications less frequent? Could be more straightforward if someone wants just one-onone chat they have no other options than Skype which isn't always ideal either due their fees so this would remove some barriers there too though still available via web cam software i guess?? As long we're talking about sending things around internally its pretty good tho nothing major issues here apart form having multiple accounts within same inbox could get confusing sometimes especially where file sharing has been involved however easy enough once set up correctly!!