Overall it is just a great platform, with a a genuinely good dashboard. Where feasibile, you even got real time data (for the spend) and the rest of the data follows suit in a timely manner.
Ad creation is fast, simple and to the point (in contrast to their closest competitor, which is tedious) and customer service is top (really nice people over there always eager to help - again in stark contrast to their closest competitor - where it is hard to get a hold onto someone there)
Always on the front to get new features released - which is great. Look alike audiences? Yes. They got that and it is working like a charm.
Always try out new features - the earlier you get in the better. Traffic is then relatively cheap. But you should work a bit conceptually before.
You can also always ask them for insights on the algoryrthm, how to optimize campaigns. It is a good way to get a second opinion and they are always helpful.