It’s nice not to carry a closed spanner but I found it relatively tricky to accurately torque and the bolts can get a bit mashed. With some track ends (with the steel inserts) it can be a problem.
Maybe longer allen keys, better quality or larger bolts (torx?) are the answer? I dunno.
imho allen key bolts on hubs aren’t great on fixed rear wheels for a number of reasons. Inconvenient as they are ... peanut butter spanners ftw.
They surly hubs are forged, so strong. Probably less prone to cracks than boutique hubs.