Dear Stuart,Thank you for your review. We generally have very positive feedback on the quality and comfort of our mattresses and all are routinely checked. That said, it is clear that the mattress was not to your liking and for that I am very sorry. Our Guest Services Team are available to assist with any issues experienced in house and would have been glad to offer an alternative apartment or, if necessary, to have replaced the mattress. I am pleased that the location worked well for you. We have apartments across London and the south of England (as well as Spain and Portugal) - please do check out our other apartments as we would love to welcome you back. Yours,Joshua MartinQuality and Brand Executive