This library originally came out from being frustrated on working on my another library - Storage.Net. While it's OK, most of the time I had to deal with SDK incompatibilities, breaking changes, oddnesses, and slowness, whereas most of the time users needs something simple that just works.
Streaming is a first-class feature. This means the streaming is real with no workarounds or in-memory buffers, so you can upload/download files of virtually unlimited sizes. Most official SDKs do not support streaming at all - surprisingly even the cloud leader's .NET SDK doesn't. Each requires some sort of crippled down version of stream - either knowing length beforehand, or will buffer it all in memory. I don't. I stream like a stream.
Proper streaming support also means that you can transform streams as you write to them or read from them - something that is not available in the native SDKs. For instance gzipping, encryption, anything else.
Use .Ls() (short for list) - very easy to remember! Everyone knows what ls does, right? Optionally allows to list entries recursively.