Tatts are a very personal thing and whatever you decide is your decision. I totally respect that.
That being said, and only because you opened the door, I would tend to counsel against getting a tatt that you saw on someone else. I am very likely in the minority on this and am not trying to say my opinion is right. I simply know how I would feel if I found out that someone took my personal design that I have on my left shoulder and copied it. I designed it, it has deep meaning to me, and I would hate for it to be duplicated.
In sum, I do like that design, but I bet you could come up with something even better and uniquely yours.