FWIW - I switched to the Tesco card about 6 months ago. You will receive 0.5% cashback in the form of Tesco 'valueclub' vouchers at regular (monthly/bi-monthly ?) intervals or you can opt to accumulate them and get a more meaningful return (e.g. wait until Christmas and it could go a long way towards the xmas provosions etc.)
At €5 rebate per €1,000 spent - I tend to use it for almost all outgoings and any business travel etc. NB I always pay the statement balance in full before the due date.
I believe American Express offer 1% cashback on one of their offerings but I find AmEx is less widely accepted.
Good luck with whichever you choose
Regards
Dicey