We stayed at the Akti year before last. We were slap bang between the two bars. When sitting outside it was quite irritating - if we liked the music from one bar it was banged out by the music from the other bar but once inside with the door shut we didn't find it much a problem at all.
We live in London suburbs although on a quiet street so it depends what you are used to... if you live in the country where you could hear a pin drop it may bother you, if you are used to some outside noise then we found it quite easy to switch off.... especially after a few retsinas!
One big bonus was the breakfast, not a huge choice but more than adequate - cheese, ham, cucumber, tomatoes, toast (you make yourself), eggs, cereal, milk etc. and the most yummy yogurt and honey. Made a nice change for us as we are usually self catering.
Also perfectly situated as you say, very central to everywhere. It certainly is value for money and I would recommend it.