I purchased this stamp instead of having our return address printed on our wedding invite envelopes. My only complaint with the stamp is that the paper needs to be flat and on a hard surface. I had stuffed my envelopes prior to stamping them, so some didn't turn out perfectly. Overall, I am very happy with how this stamp works and the results it produced.
You can also refill the ink. I haven't done this yet, but love that I won't need to buy a new stamp when the ink runs out!