I would like to install window grille. Any recommendation? Ok with typical ones

Standard aluminium grills are better than invisible grill as invisible grill will eventually loosen and become a threat. This is mentioned by one of the window vendor we spoke to. They say the wire on the invisible grill will loose and as kids grow up, they will tend to pull the wires which is dangerous. Also in case of emergency where window is the only way out of the house, then standard grills can atleast unlock unlike invisible grill. For the price depends on your window size. Will range from $900-$1400.