Newton Trainers?

So I went out and bought my first pair of Newtons yesterday. Ended up going with the Newton Trainers, mainly because the difference of weight between the trainers and the racers was pretty insignificant to me. Its kind of weird running with them as of now (Ive already put in two runs with them) and have a quick question. I think the salesperson gave me a size too big. The heal fits just fine with no movement, but it seems like there is a little too much space in the toe area. I know that Newtons have that space on the front that hits you right along the ball of your feet, but it seems a little lower than what it should. Is it ok to have some extra space in the toe area? Or should I just go back to the store and get the next size down? Thanks guys!