Actually it's better if you could provide the dimension of your window and get the quotation direct from them, cause sometimes they got promotion ongoing.
I just got my unit installed with Panther and would rate 4/4.5 out of 5 for them

For deluxe mesh casement window around 105/sqft before 20% discount, and to get 20% total order before discount should above 15k. Got the deal before metal price is increase, not sure if they still having same promo not.
1. Edges of mesh frame are quite sharp if without sanding it, it's not that difficult so I do it myself with a sandpaper.
2. Some screws found below mesh frame part are not smooth to the frame surface level, not that obvious though.
3. There's still some tiny aluminium residues found at installation area even they had tried to clean it with their own vacuum.

Already give feedback to their sales so hopefully they improve those I mentioned in future, anyway quite satisfied with their products which give premium look and safety.