Room was clean. It was small but if you are out most of the day then this should not bother you.
Bathroom was a good size and also clean.
Didn't try breakfast, you can walk to Gran via and there are several places where you can get something to eat.
Location is great, within less than a block to Gran Via. Double Decker tourist bus stops on the Gran Via. Easy access to transportation, metro stops close by.
You can easily walk to Puerta del Sol and other locations. Just make sure you wear comfortable shoes.
The hotel is located in a street with no traffic. On that same street you may find that at night a few people may hang around, sitting on the ground, perhaps drugged. We never had any trouble, they didn't seem to be bothered about anyone walking by.
As you enter the hotel you'll find a few stairs about less than 10 to walk down to the reception area. This is the only part that is not easy for those with strollers or with difficulty with walking. There is an elevator that goes up to the rooms.

Staff was generally friendly, a few here or there which were too serious.
I read in other comments that people were rude and didn't speak English. The thing is that you have to realize that Spanish people generally don't speak English. So I suggest you learn a few basic words and accept it and enjoy your stay. I found that the people in Madrid were short with their answers, kind of abrupt, didn't smile , however they were helpful when needed. Just don't let it ruin your holiday.

We are a family with two very young children (2 & 1 year old) and stayed there from the 8th of Novemeber untill the 13th.
"Los Condes" is an average hotel in a very good location. Just some steps away is the Callao Metro station and the start of the pedestrial road to the Puerto del Dol.
We have stayed in much bigger rooms, but also in smaller ones. Room size is average.
When we arrived the room was ready for us with the baby cot in the room. Unfortunately, there was no chance for second baby cot, but we can understand it. Allmost all hotels are providing just 1 per room.
The big problem was that we had to walk down 8 steps to entry the hotel without ramp!!!
I think this is very bad for a centrally located hotel in Madrid. Therei s space to built a ramp but... there is not any ramp. So we had to carry on the strollers with the babies and walk down the steps.
Hotel has a small problem with it's soundproof. Allthought the street is quiet, there are much voices coming from outside at night. Not a big problem for us, but it would be problem for someone else.
Finally, a little smell in the bathroom/toilet was not a big problem.

To be fair, the beds were comfortable and the bathroom was good-sized by European standards. HOWEVER, the noise level inside and especially outside made it impossible to sleep. It seemed as if the people outside were yelling right inside your room. We had asked for a higher floor when we checked in and found out we were on the second floor but were told none was available, which wasn"t true. The narrowness of the street ouside made people's voice bounce off the buildings and increase the volume. The location is fairly good, but since the Metro is excellent, you can stay almost anywhere in Madrid and have good access to the sights. I would recommend the Best Western Las Barajas where we stayed for two nights at the end of the trip and slept great. The breakfast was better and it was very quiet. We were still able to use the Metro to sightsee, and the rate was much less. Warning: pickpockets are everywhere in Madrid. It happened to my husband in Retiro Park and to me on the Metro.

Great location, great price but oh so small. 8x10 for a single accomodation. Bed very hard and the WIFI was irregular and unreliable. arrived around 10:30 am and had to wait until 12:30 for my room. Clean but ULTRA SMALL. Walls very thin and you wake up when people are leaving for their early morning flights. They did not credit my Best western points and I cant do it online so I have to fax my receipt to Best Western. Guess I will give Best Western another chance at another property