Reading the posts about poor sight lines of expensive seats in the Stalls Circle for this production leaves me to believe that Amphi L 48 is a good buy.
L48 is one of the best seats in the amphitheatre - in my opinion.
it is directly behind the left stairwell and is reduced price because of 'restricted view'. The restriction means that you cannot see the orchestra - but, unless you are very small you can see the whole stage - with no 'heads' in front of you.