The amount of time it takes to get an account set up, figure out what audiences you should be targeting in each market space that your business serves across all channels like FB ads/FB pages etc. This is where we have seen issues arise for some clients who are just getting started or not fully trained yet so finding someone experienced can help speed things along if needed! Also - there's still no option via automation tools (yet) compared to other platforms I've used such as google analytics 360 when creating ad sets/creating targets within those same accounts which would allow us to create multiple campaigns at once vs one by hand per campaign. There really does need more flexibility here especially since many companies want to target their entire website audience rather than only certain page views they're looking for from specific locations / demographics. We use this product primarily because most businesses don't know how much traffic comes through social media yet nor do they understand its power &.