Especially with younger swimmers. I know the BC pool is awesome, but I was a mess while my DGD was in it. She was a strong swimmer, however I am one of those "eyes on" the entire time a child is under my wing, and this pool is not conducive to that kind of watchfulness. Pool twists and turns aside, that slide is a killer for parents who cannot be in two places at once.
You will not be sorry. For my family, the Poly is a favorite. My DD and DSIL stayed there a Summer ago, and they are not full park day people either, especially in the SUmmer heat. My DD told me they spent every afternoon in or by the pool, had time for a quick shower and nap, and then back out for a latish dinner and some evening park entertainment. The location and travel convenience for the Poly, especially with the T&TC within walking distance for most folks, cannot be beat.