On my machine(s) I use it since many many years and rely on it. It's extremely helpful. In contrast to the last posting I can even correct misspelt words and still get expansion. Developers feedback and help (seldom needed) is very prompt. A real time and nerve saver, worth every penny.

I did not use typinator, which seems to offer about the same features. I use(d) popchar from the same company and there I get nerve killing offers for (payed) updates - so I do not see a reason to try out something different.