The show is a filler, but it is the best filler ever, and yes, ED is awesome:)
I like it, but i don't always see it, cause it is aired at the 9 in the morning and repeats at dinner time
the first and second series of digimon were fun, after that it went down the well and got crappy... pokémon has good episodes and crappy episodes, the only thing is that there are more crappy episodes than good ones