Definitely a good idea! Our room was very comfortable, the shared bathroom was spacious and clean, and the kitchen was very well-equipped (including a microwave oven, an espresso machine, a clean fridge, and a washing machine). The location is not very central, but at a walking distance from the hostel there is a metro station (red line) as well as various bus stations connecting this area to Lisbon's downtown (15-20 minutes ride) or to the airport (5-10 minutes ride). Great value for money!