Very nice images!
Your water with caustics looks very natural and attractive, and surroundings make this place looks very pleasant. Plants also look great. Beside that I was thinking that mountains and sea shore on background are photos, but I saw your set of images on Behance where the clay renders from the models of them are represented - they look great, very natural.
Only thing which disturbs me is that lady on the edge of the pool on first image - it feels like she has suicidal plans for her nearest future :)
Could you tell how much time these images were rendered? And how much rendering time with caustics grown up compare to the rendering time without caustics? I have installed RC3, but didn't have time to test caustics in some real scene, just small tests