LOVEFiLM

I've used love film for around a year now, a few months just paying month to month, a 6 month subscription (pay upfront for 6 months and you save more money) and now payed for another 3 months ontop of an extra month that just got paid for.

Pro's: easy to use
Easy to organize (can seperate your DVD's or games in up to 3 lists if you have a 3dvd subscription letting you organize which you want to arrive more easily).
You can rent for as long as you want (so long as your still a member)
Free delivery back and forth.
Quick delivery for the most part.
Great selection of games and DVD's

Cons: Some items will be taken up by others slowing down you getting it.
Doesn't have every game and does not have games on dreamcast or systems before that (does have Xbox, PS2 and Gamecube however) but this is understandable really. Modern systems have plenty of there games on.
Sometimes delivery is slower than hoped.

Overall though with 12 months experience I've found it to be reliable and very worthwhile. I used it for a few reasons, it allowed me to wait for games to go down in price while I played others (making it's money back), let me try multiple games and DVD's I otherwise wouldn't have tried or would have payed tons for and finally to be able to play and watch those games / DVD's I wanted to play or watch that I knew I didn't want to pay for as I'd only use them once.
It's one of the best services I've used in a long time and they deserve a good rep.