Group buy - UPVC window

[iamveer]

How is KASSA UPVC windows ? (www.kassaent.com/) has anyone tried them ?
They are importing the profiles directly from an Korean Company called KOS (www.kos.co.kr) including the fittings. Rates are very competitive compared to German brands.
Have seen it installed at some of the apartments in Bangalore. Similar to other brands, they provide complete steel reinforcement inside the profile and provide standard 10 years warranty.
They have factory at Sriperumbadur, Chennai, where they cut and assemble the profile as per actual measurement before shipping to customers.

I have shortlisted them for my house windows/french windows & doors. Price range starts from 450/ sqft on Avg

Any reviews or feedback ?