Ok i think I narrowed my pool selection down to Intex 22x54 or 12x24x54 I would like some feedback on the benefits of round over rectangle or vice a verse this pool will be used by my twin 7 year old girls, my wife and myself. Also I am a little cconfused on prepping the surface, do I use sand to level or just a small layer for comfort and does anyone have step by step pictures that show me the proccess..I am a total novice and will call you guys for more help so thanks in advance.