I have just posted on another thread about tesco.
I do not shop at tesco but I have a tesco credit card. I shop at sainsburys so get nectar points and I redeem these either in sainsburys or argos. Everyone seems to have stopped doing nectar points now and I think they are crap.
Tesco on the other hand gives you 4 times the face value so I buy my £200 RAC cover with a £50 clubcard voucher.
They send you paper clubcard vouchers but I just put the details in on-line for whatever I want, you don't have to send them off, they then send me a ticket in the post.
Days out are fab as a trip to legoland for an adult on-line ticket is £32.40 and a child is £24.30 so 2 adults and 2 children is £113.40!!! It would cost me £9.50 per person with a clubcard voucher so only £38. Huge difference and it isn't actually costing me any money.
I also do magazine subscriptions, restaurants, weekend breaks on clubcard vouchers.
There is a 2 year expiry date on the voucher which is plenty of time to spend it in.
I bought a very nice white gold diamond ring with my vouchers when they were about to expite