Quite often I need to run an If...Then check on a small portion of the outerHTML property of an object and there is no convenient way to do so. Right now I have to match the entire string of the prop...
I have not, but looking at the documentation it would certainly be a good solution if I was using a Script Test. Unfortunately if you were to try to use it in a Keyword Test it doesn't seem like it would be much different than using the Compare Properties operation, unless I'm missing something obvious.