Broadband is not fast in Spain and can be very unstable...certainly in Murcia area in my experience so far. .... at La Torre, the broadband service available (only by PW)... is available with pre-installed cabling to all properties. It is ok for e-mailing and general browsing, but not suitable for anything fast such as streaming or anything such as Skype etc.
You can get an annual contract, or you can get a PAYG type of card which is available at outlets through the resort. cards are ok if you are just there for a few days and want to keep track of e-mails etc....and vary in cost. PAYG cards are obviously more expensive , but useful if you are just an occasional user.
This is the La Torre system, but would see no difference for the other resorts.
Details of all options are under Polaris Telecoms (the only telecoms available on site for TV,Phone and Internet!!) on the www.polarisworld.com