I actually think the prison in El Salvador looks very clean and orderly. I would suggest that prison is far nicer than any prison in existence in the entire world 100 years ago.
The guards seem to have total control over the inmates, which is safer for everyone involved.
I watched a Documentary on the prison and it looks like they did it right, no tv,computors,weight rooms,conjugal visits and from what I observed no woman guards. Shows me they are serious.