The healer gets sold short by many. With its emphasis on having a good Charisma and its class skill list, it is actually a "face-man" class of sorts, like the bard. Very useful. I would have liked to have seen it called "empath" or something else a little more evocative than "healer", but I guess the designers were going for utilitarianism.
Then again, there are some design problems. The fact that it doesn't cast any spells sponstaneously--including cures--is a big turn-off, as are the armor restrictions. Also, the spell list really should account for adding in spells from other sourcebooks (like the warmage does with its advanced learning ability).