The Tower is a good hardware package for $99, but the RTOS library of functions adds too much code overhead to use the free version of codewarrior which is size limited to 64KB. And RTOS is necessary to make full use of the Ethernet, USB, CAN, etc. hardware.
So you're on the hook for the $395/year Basic version of codewarrior or codesourcery. Something to consider before buying.