See and Buy this product on Amazon.com store (affiliate):
DPReview8.5 It represents the company's entrance into the medium format digital market. Control points are plentiful, image quality is exceptional and autofocus is precise, just don't expect it to focus on moving subjects. The only thing truly holding back the GFX 50S from reaching its potential is a limited lens selection (at launch) with slow maximum apertures. Still, it is capable of the best image quality we've tested to date and is all around a lovely camera to shoot with.
Photo District News It delivers stunning image quality, tremendous high ISO performance and a user-friendliness that will likely tempt many photographers into medium format. While it’s not as well designed as Hasselblad’s X1D and lacks the speedy flash sync, it functions as a more natural bridge between a conventional mirrorless camera and a medium-format body thanks to its plentiful AF points, robust feature set and very attractive price point.