Now, you know a bit about how a multicopter flies and what the parts basically do. But let's face it; building a multicopter from scratch just isn't for the faint of heart, and frankly, it can be a bit of a learning experience. You might wish to choose a system that comes prebuilt, pre-tuned, and (for the most part) hassle-free. In this chapter, we're going to cover some of the turnkey systems out there and what to look for (and what to avoid).