Hi Luvping How's your installation getting on? I would like to share my unhappiness with them too... Decorille had recently installed my windows and grilles and i fully agree that their service are really bad. 1. Windows and grilles are full of scratches. 2. The intersection of grilles has many rough edges. 3. The alignment for 1 of the set of grilles is off. 4. All plastic brackets at corners of frames are either not joining properly or mis-aligned. 5. The tracks for all grilles and windows are nosie too. 6. An inch of the cement got chipped off at the yard during installation. During the joint inspection, they agreed to replace 1 of the badly aligned grilles set. However, 1 week later, the sales guy revert saying no replacement will be done and onli minor rectification will be carried out. When ask what rectification work are they going to carry out, they are unable to reply. We are still waiting for their reply and this has caused delay to our renovation too.