I was on the "Giants are fucked" bandwagon, until I looked at the standings and realized there'd have to be a pretty bad team that would make the playoffs if the Giants didn't (unless it was Atlanta, but I think they're REALLY fucked). If they go 3-2 in their last 5, they'll almost certainly get in. Even 2-3 gives them a decent shot at 8-8, given that the teams chasing them are 5-6 San Fran, 5-6 St. Louis, 5-6 Atlanta, 5-6 Minnesota, and 5-6 Philadelphia. Their conference record would give them a good chance to win a tiebreaker against any of those teams.
As for whether they'll make a good showing in the playoffs...no, I think they'll get beaten up pretty good against any of the division winners.