Verified answer

The sightseeing pass is Only good If you plan on going to Most of the attractions listed-check out the prices on the attractions you are sure you will be going to and compare- also the added on Transportation options is for zones 1-6- most tourist sites are in zones 1 &2 so you are paying for zones you most likely will not even use

--also Most major museums are Free( british/national gallery/V&A/Tate) so you don't need to count those as paid attractions

Otherwise the oyster card is Best for basic transportation needs- you top up your card as needed and it can be Reused on another visit- doesn't expire like the London Pass does

Trip Adviser has several threads on this subject with various opinions

http://www.tripadvisor.com/ShowTopic-g186338-i17-k...

http://www.tripadvisor.com/ShowTopic-g186338-i17-k...