I've been a couple of times before when I've been "desperate" and it's a Plan D /E !
The pictures of the women are at least 15-20 years old and the whole operation is a bit "grubby".
They have also recently opened a shop in PDC on Calle Chalana where the same women offer a lesser service for more money under the pretence of being a legit massage shop. Go figure! For 60 euros at Gabiete place you can get 30 mins FS with OWO and obviously they are fully naked. At the shop they will charge you 50 Euros for 60 min massage....but in reality after 20 mins on the "turn" they will upsell to HE for extra 30 euros, fully clothed! Then find yourself back out on the street just after 45 mins!!
YMMV, but be warned!
Looks like Pasion.com has clamped down on the 'personal' services, but looks like most are migrating over to Destacamos.com now.
Be warned, and have fun!