ecurbh is right; the best part is not having to go out and see if the video store has the movie, then worry about whether or not you remember to get it back on time. With Netflix, you just don't get a movie to replace that one until you send it back. With their basic service, you can have 3 movies out at any one time. There are LOTS of movies for kids, so you can always order some for Autumn when you order yours.
For Christmas this year, SSQ bought the parts to make a MONDO subwoofer for our TV room in the basement. We watched FoTR to 'christen it'. The WALLS were vibrating during the "Sauron buys it" scene, and we got that distinctive rolling low sound we heard in the theater!! IT WAS AWESOME! We do a lot of movie watching as a family, so it's great having some nice equipment.
Yep, I'm happy with Netflix too. I can watch movies now whilst I'm freepin'.