I used it, as a trial and found it simply useful and very convenient.  The 'MAKE YOUR OWN STAMPS' feature is the best part.

 Overall, if you are into any business or atleast have an home office, I think you should try - you will love it.

I personally recommend, go for the trail offer, its free and also you get to keep $25.00 worth of stamps, which you print at home.  Make sure that you print a draft copy before printing the original ones.