Originally Posted by ncage
I've never tried vudu so not sure exactly how it works.
Vudu is pretty straightforward for rentals. It's a pay-as-you-go service. They give you up to three resolutions, SD (480i or p, can't remember which), HD (1080i), or HDX (1080p.) Usually going up a resolution is an extra dollar, though there are a few movies that only have SD. Usually it's around $4-$6 on average, but there are some a tad pricier if they're popular or a special promotion (pre-theatrical release, released while still in theaters, etc) or a tad cheaper if they're older movies. They also have a $0.99 movie of the day that can be newer or older.
In any case, you get 30 days after the payment to watch the movie, though once you start, it is reduced to 24 hours to finish it (or less, if your 30 days has fallen to under 24 hours.) Within the 24 hour period you can watch it as much as you like. Vudu's purchased movies are stored in the cloud and can be streamed unlimited times.
Vudu's ace in the hole is that it tends to get newer releases better than the other services. It's a tad pricier per movie, but you only pay when you want to use it, no monthly subscriptions, so it's a good supplement if you want to watch something and it's not available elsewhere. With a good internet connection, it has good resolution, DD+ for most movies, and not much buffering (though it does crop up on occasion.)