Just to clarify, Casas Del Sol are not an apartment block, they are a complex of terraced villas. It's a residential complex and was one of the first of it's kind built in PB. The pool is saltwater, there are also tennis courts. If you want somewhere quiet these are ideal, like many residential complexes the pool is mostly deserted during the week. It is set on a hillside and the paths can be steep depending on where your villa is. They are in an ideal location just across from the harbour and 5 minutes from the main shopping area in PB. Just across the road beside the harbour you have a shopping centre with a spar, some bars and restauarants and a couple of chinese takewaways. There is a large Hiperdino supermarket within walking distance.
If you're looking for somewhere a bit more lively Las Brisas, 2 complexes up would be ideal, it was the original Wimpey built timeshare place in PB. It has a bar and restaurant onsite with evening entertainment, freshwater pool and the comfiest sunbeds you've ever seen. It is always very busy, especially around the pool area. It's 2 minutes from the shopping centre and on the other side of the dual carriageway from the large Hiperdono supermarket.
I've stayed at both complexes and wouldn't hesitate to recommend either of them.