The platform has been very flexible, allowing us to use all of their services as we've needed them in order for our app to grow with our business's needs! None that I can think of right now but they are always willing to work out any issues if need be. It took some time getting everything setup correctly but once it was set up the support team were quick at responding when things went wrong or not quite working how expected/needed. We're using several different ad formats across multiple platforms (mobile web & apps) so having flexibility within one solution would have made my life easier in this regard - no more juggling between 2 providers that didn't integrate well together.