I've been a member for about 3 years, ever since a friend gave me a free trial. The service is quick and reasonably priced. They even have some fitness DVD's (though they are sometimes hard to find in the listings). So convenient.
When I became a member, the "3 at a time" program (which is what I have) was $19.95 a month. Then they announced a price increase (about a year ago?) to $24.95 a month. Then, just a couple of months later, I got a notice saying that because of customer complaints and feedback, they were reducing the price to $17.95 a month! LESS than what it was before the price increase! And they've added additional distribution centers, so the service is faster.
I like not having to think about going out to get a move, having access to movies that might not be available at my local video store (especially foreign films and obscure titles), and being able to return the DVD just by putting it in the mail (though for a faster delivery, I often will drop it at the P.O.)