I tried Broadband by Satellite when in Spain. The results were not impressive and I didn't renew my annual subscription.
Their are two types (a) one way communication via satellite (b) two way via satellite.
In the first case you need to connect to the Internet by phone and all the data downloaded comes via one of the many satellites. In the second case you communicate both ways via satellite.
One way communication using a telephone is relatively cheap. I had a Technosat USB DVB Receiver pointing via a 60cm dish at 7 deg East. This is the Eutelsat OpenSky service. I used (the now defunct) Europe On Line ISP. The equipment and first year subs cost about £200.
Two way via a satellite needs very expensive equipment (c £2k) and is very expensive in data transmitted. It's only for serious business use OR when a number of users can club together and share a single installation (but it's a nightmare working out who's used how much bandwidth).
One way satellite is usable if you really don't have an alternative but I never met anyone who was really satisfied with the service, which is a pity because the concept is excellent!
One way needs you to keep your telephone connected whilst on the Internet.
If any one wants any more info post here and I'll try to answer.