As repair technicians kinds used, but here we are of sound workmanship far. The assembling of the frame is real Fummelarbeit because holes are set wrong and welded joints were poorly executed. The frame itself is relatively unstable. By used Phillips screws can not be expended to produce a sufficient traction force. Machine screws would make more sense. The drawing of the assembly instructions is way too small to rule out a priori assembly errors. The two wheels were without flaws. The tray there at the hardware store for 7 euros. Delivery was quick and easy. Untested bike coupling, but seems OK Summary: Price / performance is not given, much too expensive for the botch. As a manufacturer, I would be ashamed.