I've used Esther's flat before when attending a conference at the RAI. It's a two bedroom, 2 couples apartment with all the facilities you could reasonably expect a 10-15 minute walk from the RAI and train, the tram is at the end of the road along with cafe, restaurants and supermarket. I can not recommend this place enough if you are attending a trade show like me. Esther is a fantastic host and very helpful