Had a few issues with the mcst regarding installation of invisible. Not sure if you guys face any problems? Anyway I got 3 quotes, legate, invisys and csa.

Was pretty disappointed with legate as their salesperson was late for an hr and when I ask them if they are able to get the mcst approval and he just said the mcst had already stated that its not approved but if I want, he will just install for me but there is nothing he can do. He seems abit pushy too.

Invisys showed me their product. Was quite confuse as the things that legate n invisys says are the exact opposite. Told me that they will try to get the mcst approval but haven't hear from them since.

Got csa contact from my id so decide to contact them. The salesperson seems quite experienced. Explain to me about the difference of materials used n quality and clearing my doubt of cleaning the windows after reading so many feedbacks. At first wasn't too keen as expect that a contact from a Id will usually end up more expensive but was surprise they are about 100 cheaper from my previous quotes. He even assure me that he is able to get the mcst approval. Wasn't pushy when I said I need to consider n wait for the mcst approval. He wrote to the management but the mcst was still firm on their stand.he even wrote to ura the next day n manage to get the approval from ura n then the management of my condo. Decide to go with csa at the end because of the service n product which seems identical to legate's but the test report seems rated higher.
Got the installation 3 days later and the workmanship is pretty good and the wires seems pretty sturdy though invisible grille is not that invisible :(. Much better than those aluminum though. The installer seems pretty nice too as they helped me drill a few holes for my paintings after the installation.The salesperson also called in the evening to make sure everything is ok and apologize for not being around. Pretty good after sales. I will strongly recommend them if u r interested in invisible grilles. If you prefer the movable kind, I will suggest the aluminum grille as invisible grille casement or sliding comes with a frame n it's much much more expensive and flimsy.

Just my 2 cts worth.