@hollitz: Also the audio notes in the hospital from the doctor's clearly state that they've tried the exact same thing before and it failed. Ellie's death would have probably ended up the same and been for nothing.
An interesting thought though from Ellie's perspective is her quality of life will never be on par with other kids her age, and maybe she had fully thought out the possibility of her demise after finding the fireflies and maybe even expected it.
The advantage that a good critic provides is that you can get a feel for their tastes. If you know what somebody likes and find that you can trust them then you can put proper weight into their opinion. That said, I find things like podcasts way more valuable than written reviews these days. People seem to be able to better articulate their feelings through conversation.
A good critic should be able to evaluate a product from a neutral perspective.
Say what you want about Roger Ebert but that man knew movies, and gave generally favorable reviews to some movies that were quite unexpected but generally on the money.