While doing some work from home, I stayed for a week in these apartments. It was pretty good, and I really felt at home. They're located in the Poligono X industrial area; it's not particularly central, but they're very well-connected to the city and the ring road. There's no bus service from the door, but you can walk downtown in 10 - 15 minutes. My apartment had two bedrooms (one with a double bed, the other with a 90cm bed), a lounge, kitchen and bathroom. It was completely furnished with a microwave, large fridge, stove and washing machine in the kitchen, with all kinds of utensils (plates, cutlery, cups, coffee, etc).
The lounge had a small bookshelf (somewhat bare, as it had no ornaments or books), TV with satellite dish, three-seater sofa and another smaller one, a coffee table and a dining table with a couple of chairs. The bathroom was quite spacious with a large bath, sink, toilet and bidet. There was a rather large mirror over the sink, and a small cupboard above the bidet. The bedroom had a broad, three-door closet, and there was another one in the hallway, even bigger. The small room had a desk, and there was free internet (wifi throughout the house). Of course, there were heaters, too. The truth is that it is an excellent choice for a few days, and you'll have a completely free schedule (the cleaners come twice a week), though of course you'll have to make your own food, etc. The same owners have two more buildings, too.
Due to a serious problem with my house, I had to move out temporarily to allow urgent work to be done. I decided to rent an apartment for a few days, and found these: there aren't many options in Leon, but I knew about these apartments, managed by the Hotel Puerta de Leon. They have several apartments for rent in different buildings in the city but, as they were all full, I was offered the chance to stay in a brand-new building. It stands on Avenida Alvaro Lopez Nuñez, next to the Colegio de los Maristas and the Arco de la Carcel.
It's a new construction, and of the five apartments here, only two were furnished and ready for guests when I stayed. In fact, they had to bring me a couple of blankets and some blankets, and the heating had never benen turned on before! It really was fantastic: a bedroom with two beds pushed together and a spacious cupboard, a bathroom with bath, a spacious living room with a sofa and a huge flat-screen TV, and a dining table with four chairs. The living room has a door leading to a small fully equipped kitchen with fridge, washing machine and microwave with grill (since there is no oven). There are cutlery, pans, glasses, cups, sheets, towels, etc, but there aren't a lot of any of them.
There is central heating, radiators, and a thermostat to regulate the room temperature. The manager is a real star, and gave me a lot of help, as these apartments really are brand new. Payment is made in advance (in my case, 50 € + VAT each day, but there's enough space for 2 people), and a deposit of 200 €. The minimum stay is one week, and the apartment is cleaned twice a week (the sheets are changed once a week). Anyway, I liked it. Ideal for extended stays, a 10 minute walk from the city center (Plaza de Santo Domingo).