Good and Bad
The good:

It's relatively cheap if more than 2 people are staying.
It's in a quiet neighbourhood conveniently located near shops and places to eat and public transport.
It's about 30 minute walk to the beach.
The blinds shut out a huge amount of light and noise, which is excellent.

The bad:
The overall condition of the apartment is cheap and not maintained.
The electrics in the apartment are dangerous (live socket hanging out the wall) and infuriating (if you use microwave or oven or washing machine, or even turn on a light while the Air Conditioning is running the fuse box will trip over and over)
The beds are not comfortable, very cheap hard mattresses on very cheap frames.
Cockroaches, whilst not uncommon in Spain, are still unpleasant.
The leather sofa is so worn out that sitting on it will leave little leather bits all over you.
All of the cutlery (what little there is) and crockery was filthy, despite the cleaning fee associated with renting??
The cutlery with the plastic handles is awful; a spoon snapped in half whilst I was eating half-melted ice cream.
Air conditioner is not properly plumbed in; meaning you have to empty a water bottle regularly if you want to keep the apartment cool.
The oven is dangerous; the door does not close easily and the handle will burn you, it burned me.
Generally the apartment feels like it is set up for the benefit of photographs; it's not comfortable to live in, so whilst it does look exactly as the photos describe, it's not as nice as you think it will be.

This apartment needs rewiring, I've no doubt that it doesn't meet electrical safety standards, and refurbishing with better quality beds as a bare minimum.

It's worth noting that the neighbours are very easily heard, and are currently renovating, whilst this isn't anyone's fault, the constant noise of banging and drilling became very annoying.

I would not stay here again.

Matt