There are some who worry about GAfE. They often do not use the suite of apps. Should you be interested in understanding the myths that are written and said about Google Apps, read this blog post: http://henrythiele.blogspot.com/2010/11/roadblocks-in-deploying-google-apps-fud.html
Google Apps, for me, provide an essential part of working online because they draw together lots of services. We need to be careful about our data and relying on one monolithic organisation but Google provides a superb service and an amazingly useful and usable set of collaborative tools. They are not perfect but they are brilliant.