I have to say I find the 176 really useful to get straight into central london if I've got a bit of time on my hands. However, after the pubs close on the weekend it's extremely busy and not so reliable coming back - it's not unusal to have one pass by without stopping because it's full. Although, true, it is 24 hours, which is handy.
But the W...a....l...w...o...r...t.............................h
R
o
a
d!
More than once it's taken me 45 minutes to get from King's to the Elephant or vice versa. Sorry, not got that kind of time.