It is native to much of the west coast and while it can be an agressive spreader in its natural environment, I'd certainly not consider it invasive and it IS much slower to establish in a cultivated garden. The only hits I could find referring to invasiveness are in European, British or Australian sites and I know it can be problematic in those areas. May suffer dieback and foliar damage in colder climates and is less likely to produce a lot of fruit, so its invasive potential in your area should be limited. Placement in dry shade will also limit its spread by suckering.