I stayed for three nights at NL Pacifico, and on several occations I came to find my room unlocked, even though I made certain that it was locked when I left it. I raised this serious issue with the guy at the reception, but only sporadic effort was done to fix it. I traveled with a colleague, and he experienced the same thing a coule of times.
Another negative: Free internet - max 100MB download per 24 hours, and really really slow.
On the positive side, the room was quiet, clean. The breakfast buffet was also nice.
- Free Wifi