I have the Avia with the filters and its pretty easy to use. They have a tutorial that you watch and it explains each step of the process. Im not sure how great the color filters are. I played with that for a while and in the end I ended up using the default settings on my panel. I think its like everyone says, get the contrast and brightness down and your more then 1/2 way done with your calibration.
AVRant just had a podcast regarding video calibration that should be checked out. They go over the "entry, mid, and high" end types of calibration.