We loved Lucus apartment in Shoreditch! It was clean, spacious, nicely decorated with a non-cluttered ambiance, and felt like a real "home" in London! Lucus was also quick to answer the few questions we had. Unfortunately the november weather did not allow us to spend time at the terrace, but I am sure that when springtime comes it is a real gem! Shoreditch is a fun area with lots of trendy shops, restaurants and cafés. Not in the center of London though, so if you want to visit museums and other sites be prepared to spend some time on local transportation... And as it gets noisy at night, make sure to bring earplugs (if you are a light sleeper...)
All in all, I can highly recommend staying at Lucus duplex apartment!