Skate fit is absolutely the most important "feature" of the skates. Heel lock is crucial; without that you will be fighting your skates at the expense of balance, speed, and agility. Grafs offer multiple "fits" for different feet.
The G35 fits a narrow, pronounced heel and a wider forefoot, which gives me the best fit I've ever had. The liner is thick and has a lot of cushion which makes it comfortable and helps take up negative space. It also comes with SIDAS moldable insoles, which require a special fitting machine, but again removes any negative space and makes the skates very comfortable.
The downsides are that the skate is heavier than others due to construction, and blocking shots will be more painful, but it should last a lot longer as the materials don't break down quickly.
Also, the skate has a forward pitch and 11' radius compared to others which are usually neutral pitch and 9-10' radius, so advanced skaters may want to have their sharpener match profiles when purchasing.