Netflix

The Netflix Media Center add-in is a 10-ft interface for accessing the Netflix Watch Instantly library, as well as your DVD Queue. While many devices have a Watch Instantly app, very few let you manage your queue as well. The cost for streaming instantly is $7.99/month. The streaming library has a wide variety of movies and TV shows, but very few new releases. Starting in September 2011, the fee for mail-in discs (which have a newer and more complete selection) is an additional 7.99, at the least. Netflix Watch Instantly is currently only available in Canada and the US.
Installation
Netflix will automatically install as a tile on your Windows Media Center Start screen, in the Movies section. If you have a new OS installation, and still don't see it, you can force a download by going to Tasks>Settings>General>Automatic Update Options, and manually updating.[1]
On September 15, 2015, Microsoft dropped support for the Netflix Media Center add-in and removed it from users' systems who updated on or after that date. [2]
In 4th Quarter, 2015, a WMC user (Marc Davis) began writing a replacement add-in. Netflix for Windows Media Center
Pros and Cons of Watch Instantly
PROS:
Unlimited - Watch all the movies that you want for $8/month Integrates into windows media center Video is good quality (depending on connection speed) Audio is good quality Conveinence - Instant access to movie library and thousands of movies No late fees Free One Month Trial
CONS:
Very dependant on your pc's hardware Very dependant on your internet connection speed. Poor selection of NEW releases No closed-captioning
Netflix, Inc. [3]