We had the basement flat for one week at Easter. The flat itself was comfortable, with all the appliances you would need. It was a very clean flat. The basement flat has access to the garden which is lovely for sitting out in. The location is ideal for everything in Plymouth and in terms of the flat itself it was very nice.
However a very big drawback to being in the basement was all the noise from above, the floor boards above were extremely squeaky and we were unfortunate in that the people staying in the flat above were up at 6am every morning and moving around for a couple of hours. Which was very disruptive and unfortunately let down a very nice flat.