It is very much so a park board, primarily rails and boxes because of how soft it is. I am no park guy but I know you generally want something at least a little more stable to go off good sized kickers in case you need the speed. If you say you want to cruise around the mountain and pop off jumps you find I would personally prefer something less flexible so I can get more pop(usually the case of stiffer boards) and go faster(more stable, edge digs harder for turns).
If you say you want to advance rails/boxes/presses this'll be fine.
I read that you should get one that is 5cm smaller than your usually size. I am going to use this board for like 3 years and I am just starting my big growth spurt, I am using a 155 right now so what size what you recommend? If it helps my older brother uses a 160 and he is done growing.