I loved being with them for a year when i was in the UK. They have a 24 hour turnaround time and if you are ruthless with watching them (I would watch them immediately and post them back the same day) you can really make savings - i have afew tips.
they used to do a 3 month trial for the price of one month. See if you can still get this, then about a week or 10 days before the 3 months are up (set a reminder somewhere), cancel - you have to call india but it's no big deal, then a week later, like clockwork, they will send you an email telling you that you can have another 3 month trial for the price of one month. I have a friend who has been doing this for 3 years (he's only paid for one year's worth). At that price, go for the MAX deal. you don't have to repopulate your list or anything it just does goes inactive until you re-activate it. All of you should try this, I swear it worked last i heard. If they don't get back to you in 2 weeks, just re-activate it. I did it for a year and saw well over 100 movies and paid less than 50quid for the year.
I had a disc go missing - never recieved it in the post, theis happened twice, once it turned up about a week late, so no biggie, the next one just never made it, so they ssend you a form to claim it back from Royal mail on your behalf, it can take a while but they were nice as pie about it and sent me extra movies straight away.
My other suggestion is: don't let your list get too long, 20-30 films is fine otherwise you won't ever get the new releases - they will just send you the easy back catalogue stuff - the priority thing was fucking pointless.
I've never had any problems with them - if they do screw up they just send you an extra movie - easy. Do it, but be RUTHLESS!!!!!!!! if you have a movie lying around for a week that you haven't watched, that could have been 2 more movies.