its still better to use word or another program to do spell checks and grammar checks than not to use anything at all. However nothing replaces careful reading and editing and an objective eye of a friend willing to do it is invaluable.

I still remember being in a hurry and using the spell checker on a document and I changed what should have read "Message from the Director" to "Massage from the Director" in it. Fortunately it got caught before being printed and it became a bit of a running joke for awhile. hehe