i called and got a quotation so i think calling is faster? lol
it is fixed so cannot slide open. the person have showed me how the invisiblegrille works and actually because its still quite easy for hands to fit through the gap, so does not really obstruct.
i did visit le-gate at the recent booth they set up at the expo for some living fair. i find le-gate's worksmanship not as good as invisiblegrille's judging on the samples they show me.
i am doing four windows for my 4-room flat and my total cost was $1100.
it is charged at 12.90/sq feet. did re-consider after hearing the price before getting but it really is big difference with normal grille so i find it worth it