We're just back from a Free week's holiday at Club la Costa near Fuengirola in Spain. We had to pay �60 each in total but got to take another couple with us. Also had to pay taxi fare from the airport which was 38 Euros each way, but had a fabulous holiday. Accommodation is not five star, but is perfectly acceptable - clean and well appointed apartment.
We did have to attend a further "presentation" during the holiday but there was no hard sell and we got to see one of their top of the range apartments, which was gorgeous.
We went with pretty low expectations, having read some dodgy reviews on TripAdvisor.com but were pleasantly surprised.
If you tell them you already own timeshare you can get out of the presentation pretty painlessly!