This is a warning, because I've had my fingers burnt to the tune of £40.
I took out a free trial subscription to Cinema Paradiso DVD rental (although the fact it was a free trial isn't relevant) and ordered two DVDs which we watched and I posted back in the envelope supplied.
Cinema Paradiso is claiming they never arrived, and because I don't have proof of postage, have debited £40 from my credit card.
I've cancelled the service and complained to Royal Mail who've compensated me to the tune of a book of first class stamps - again because I didn't have proof of postage.
Now, the whole idea of these DVD rental contracts is convenience - order online, watch DVD and keep it as long as you like, then pop in the postbox.
I'm sure it probably did say somewhere in the small print that you have to get proof of purchase in case of it going missing, but I wouldn't have done it if I'd realised that.
So - caveat emptor. I've written a pleading letter to my credit card company hoping they might refund me, but am not holding my breath.
£20 per DVD (they were old ones too - Kramer vs Kramer was one) is a rip-off amount to charge me anyway imo and I do wonder if it's a scam because I cancelled the account first after the free trial (I was trying a few companies out before, in theory sticking with the one I though was best)
Be warned if you have one of these contracts though - make sure you get proof of purchase.