Well personally I thought eps 5 & 6 were pretty lame. The space battle effects were extremely weak (mainly the Osiris defensive batteries and the crash), the dialogue stolen from the mini series again shows how small the universe is getting, the fx for the dogfight in the atmosphere was very poor compared to what we've seen so far and everyone has already discussed the snow scenes.
What was the point of the canyon? Why not just have the action in that cave topside? They got out pretty easy so there wasn't much tension involved.
The snake was a silly idea, although in retrospect having it as a Cylon sentry / experiment works.
Hopefully it improves next week.