We've had our differences, to be sure, but I could not agree more with this. I almost replied earlier to the guy who said "Enterprise failed" by saying "In what universe? Enterprise got four seasons, which if you didn't notice is the same as a number of respected TV series and three more seasons than Firefly!"
Enterprise was cancelled. They didn't want just four seasons. Same with the original Star Trek and the animated version. Three out of six series were able to end on their own merit after seven years, an abnormally high percentage for TV series (65% are cancelled after the first season - which has never happened with Star Trek).