 Nothing 
 Everything in this hotel made our vacation perfect We even wanted to renew our stay but there was no empty rooms We had a great trouble finding a decent 4 hotel after this one Most hotels turn off the air conditioning and it s hot like hell Other hotels tell you to open the window in the very busy Barcelona H10 metropolitan is a true 4 hotel with perfect room design super friendly staff clean rooms comfortable beds not noisy rooms and great position They even offered us a complementary champagne bottle but since we don t drink they took it away and got us orange juice instead We also got a free upgrade to a room with a terrace balcony 