I"ve just spent 5 nights at this budget hotel located very centrally in Seville. I had a room on the first floor (102) with private bathroom, both very small but clean. I had 2 main problems : 1-The room had no external windows, but only a window with view on the reception (!!).
2 - The noise (especially at night) that comes from the reception (you can't keep the window open even though it get extremely hot or you won't sleep) , from other guests returning to their room, from the drinks vending machine at the reception and from the air conditioning.
So, ok if you are on a budget (i paid around 40gbp / night ) but you will never see the sun light from your room (most of them have no external windows) and you'd better take earplugs with you if you are a light sleeper.
- Hostal Paris Seville