Good boots but with some caveats. The comfort is a bit sub-par but everything else is done well.
I wear a size 8.5 shoe. I sized up to 9 in this boot and it still fit well.
The lining is rough like sandpaper. Expect to wear thick crew socks. The boots wore my skin raw at the ankle bone with ankle socks.
The rigid structure is a bit uncomfortable. I can feel it rub on my ankle bone. This is just the nature of a rigid boot I think. I don't own Sidi's or anything so I can't compare.
Boots are warm but not excessively so. These are not vented. Not sure about waterproofing; I stay out of the rain.
Soles are rubber, grippy. Not so stiff you can't walk in them.
Ankle flex is a bit limited on gear shifting but workable. Boot may just need to be broken in more.
Materials are quality. Tough zippers, plastic, and "leather".
Half-zipper cover by a hook and loop fastener up the inside of the boot. Well done.
They include calf/shin protection and substantial.
The boots are a subdued silver and black. Not white and black if it's not obvious.
Aesthetics are outstanding as motorcycle gear. Still has the Power Ranger look to it of course.