I enjoyed the first three installments of the Mega Man Battle Network series, but the franchise seems to have gone downhill after that. I found the fourth entry markedly less enjoyable than its predecessors, and this fifth entry also suffers from a general decline in what made the earlier installments stand out from the crowd (involving story, likable characters, compelling gameplay, etc.). Also, I find the Liberation Missions an unwelcome addition to the gameplay. They take quite a while to complete, and if you lose you have to start all over again.
I don't think I'll bother with "Mega Man Battle Network 6".
I was skeptical at first about renting this megaman game, I have played every other one 1-4. But I MUST say that the new turn based Liberation missions are a refreshing Twist to the old games. You control differant navis that Range from Protoman to Napalm man. (Napalm Man being my favorite) If you have a GBA, DS, Anything that plays a GBA game and you have liked the other Battle Network games... do yourself a favor and go check this out!