Ovulation tests?

I have PCOS, so I have incredibly irregular cycles, and even though I'm not trying to have a baby at all, I am thinking about using them to see if I am ovulating. Not religiously, just one or two a month to see if I do have LH surges. It would give me a piece of mind definitely. 
Has anyone else done this? Or would it be a waste of money? 
TIA