Marina was a lovely host - replying to messages quickly and efficiently and doing her best to provide a full concierge service. The flat is amazing - it's a proper home and feels comfortable and modern. The kitchen is very well equipped so much so that you really can make yourself at home there. Looking at the map the flat looked to be a little way out of the city but it is about 20 mins walk to get to the main town centre and St Stephens. The tube is really easy too - if you are there for more than 2 days buy a weekly pass (it's cheaper than a 3 day one) and if you go to the airport via the brown tube line and the ordinary trains you only have to pay the excess which is a couple of Euros each rather than 21 Euros on the city flier.
Loved the fact we had two proper double bedrooms, a big bathroom with endless hot water and a decent shower as well as a heated towel rail.
Marina provides pretty much everything so you just need to turn up with your clothes and toiletries as you would if you were staying with a friend (which is rather how it feels).
Would HIGHLY recommend this place and Marina as a host.