Which brand of broken bridge aluminum window has good quality?

Now the whole bridge aluminum door and window industry can be said to be mixed; All kinds of good, bad, cheap and expensive doors and windows can be said to be varied, but whether the quality of broken aluminum is so easy to judge intuitively, ordinary consumers have no way to know whether their doors and windows are qualified ~ so choosing a bigger brand can give themselves some protection, some doors and windows are said to be broken aluminum, but the middle aluminum material to nylon may be the product of cutting corners or even stealing pillars, and the effect and life span are not guaranteed; As far as I know, Warren doors and windows are our big-name doors and windows in Beijing. There are also many programs sponsored by TV stations. The price is not the cheapest, but things must be high-end and good. If you buy it safely, the price is slightly higher. However, I heard that Warren's terminal discount at the cross-dressing group purchase meeting is quite large, which can be several hundred square meters cheaper than buying it in the store. If you are interested, you should get to know it.