Carlos & Sarai's place was perfect for us with a conference st IFEMA. We walked there only 15 minutes. But heaps of buses if you wanted. Easy access to Metro st Canillas only a 2 minute bus ride. Straightforward getting into downtown on metro. We used the Madrid 3 day transport pass. Apartment is spacious and beautifully kitted out. Everything you could want. Sarai met us and explained everything. Excellent hosts.