It is a very useful tool, you can get updates of your favorite sites directly to your pc(if you use desktop rss reader) or to your account at online rss reader. In case your favorite sites use rss feeds, more information about rss technologies you can read at http://en.wikipedia.org/wiki/RSS_(file_format)
Yes I do use these RSS readers and while they had some bugs at first,I have noticed they are much improved.I use the Google Reader for these RSS feeds and find that saves me a lot of time as once setup sites of interest feed topics of interest into the Reader.Ths saves a lot of going from one site to another and often I am informed of things I might have missed otherwise.In one case I was actually able to save over $800 on an auto repair due to a service bulletin notification via RSS.
