Absolutely the best I found after months of research and testing. Very small, very clean, and well documented.
I spent over 25 years in IT and only dabbled with Linux from time to time. When I finally got serious, I wanted to build and compile a system by hand. After months of research and testing I found MLL, and it was perfect.
I have a new project on the horizon and with a little help from my friends, and MLL I am sure it will be a success.
This is one of the smallest Linux distros round. Nothing but the kernel and a few command line tools (through Busybox). Truly minimal and light. User can customize the distro at build time using a config file.