What I see in him is a high degree of talent. It's more than just mentality imo. I have watched him so far, and his movement in goal is incredible. The way he catches low crosses for example, fuck it's good, lightning fast in going down from standing position. No dumb spills, no punching shots that can be caught. Leaves nothing to chance. The way to beat him at the moment is with a thunder strike under the bar like Rayo, or a penalty like situation like Gordon.
He will make mistakes at times, but it's possible we just locked in a vulnerable squad position, a known Achiles heel for us for years and years.