I like that it is easy to get started with dash bird, you can just click start monitoring in minutes without any configuration required! It's also super cheap for what they provide (free).
The dashboard itself could be better organized but not too much of an issue since we only use this as our starting point at first anyway so there isn't anything really special about how things look or work from day one when using them out-of box if thats your concern? We are solving problems around performance issues by making sure applications run well across multiple nodes/instances which helps us keep costs down while ensuring customers receive good service levels throughout their lifecycle.