What is the quality of the replacement screens?

How close does the replacement screen quality compare to the original? Will the new replacement screen lack durability and/or have color balance issues? If these differences exist are they only noticable when placed side by side with an original? Are the replacement screens made of Gorrila glass or are they of a less drop resistant material? My original screen lasted years and was dropped numerous times including a few on hard surfaces. This last time it shattered but considering the number of times dropped I felt it lasted a long time. I love iFixIt but this is the first time I've had to fix my own device so I care more than usual about quality. Thanks!