I have owned some but not titanium. They are the same quality as all other swatch group brands in the same price range, so Hamilton and Tissot etc.
Powermatics are very accurate, my ones were easily within COSC i feel.
I never had to service or repair one but i seem to recall that they need to go back to swatch for repair, maybe they don`t sell the parts to non swatch watchmakers but not 100% sure.
There are several grades of powermatic 80, from memory the mid or higher range version is worth getting if possible.