@Melgeek when do you plan to stock the ISO UK extension ?
@OP these keys are very flat on top, you wont really feel they are spherical to be honest. The top surface is very large and square-ish. The keycaps are very thick and in PBT, leading to a very nice sound. The top texture is fine matte (not as grainy as SP sets for instance). The dye sub is very good, well defined, didnt see any major flaw. Typing comfort is great, the profile is very smooth from row to row. One of my favorites along with KAT and XDAS.