If you rent and watch enough movies to make the price worth it it, it's great. But if you're one of those people who gets a movie and lets it lay around the house for a month you'd probably be better off not subscribing.
Yep. I constantly change my plan to ratchet back to 2 at a time when there's a decent amount of live TV to watch (via DVR) and then during dead periods (December for instance), I'll bump it up to 3 or 4. If I have disks lying around for more than a day or so, I know it's time to downgrade. But I don't mind constantly futzing with my account like that - I guess I find it entertaining in its own right. Also, it appeals to my cheapskate side.