ProfitBricks has a nice interface that is easy to use and provision live servers with a visio-style drag-and-drop association. You can build LANs, VMs, disks, etc by "connecting the dots" so to speak.
Pricing is fantastic as well. With a purely utilitarian style pricing model (like AWS), but at a lower price point that most of the competitors it is a very compelling option.
Also, their Las Vegas Datacenter is located right here in town and we have physical access to the same facility that they are located in. This makes coordinating efforts and access to our data and systems much easier.
Getting support generally goes through their engineering team in Germany and the time and language barriers can be difficult to deal with at times.
ProfitBricks has allowed us to scale our clients' infrastructure dynamically without purchasing new hardware. We have built a deep partnership and they are always there to help with the business side of our operations, as well as providing assistance on the technical side.