I liked how it didn't force you to use a predefined IDE. I had the option to choose my IDE. Of course I went for Microsoft Visual Studio. During my time using bamboo, it was evident how they always have the developer in mind. They have great compatibility with source controls systems such as GIT and SVN.
I felt that the 7 days free trial was way too short. I started to like Bamboo way later. It is not the type of environments that you start to like the first time you use it.
Bamboo is a good option when you have to build multiple times and work with compiled programming languages. If you work with C# or Java(interpreted programming languages), then do not go for Bamboo.
We forced our VPS to multiple builds in very short time periods, and the lifespan of it was shortened. With Bamboo, we not only had the option for multiple and efficient builds, we had the capability to use source control revision systems(mainly git).