ZOHO and GOOGLEDOC Applications

I am really suprised that these applications are available for everybody to use at no cost. They both provide most of the same features as a Microsoft product. I found myself partial to the GOOGLEDOCS application, I already am using the GOOGLE calender for collarboration with my family. It is so nice that we can all edit dates and events on the calender without even having to communicate them. One of the best features of these applications is their ability to let numerous people work on a document without having to send the document back and forth through an e-mail, mail, fax or other, they can edit it on their own time and everybody else can see those changes in real time. I believe that GOOGLEDOC's feature surrounding this concept works better than ZOHO because in ZOHO you have to be invited in order to edit documents. I am sure that Microsoft Office has some programs and features that out perform these two applications, but I am sold that ZOHO and GOOLEDOC would work just fine for most of the people who use a word processing or spreadsheet program.