The product design is successful: colorful, decorated with Disney characters, attractive. The assembly is not clear because the user manual has only exploded view of the different elements and numbering them, but no step by step procedure as found for example in IKEA products. It takes an hour for a successful assembly, with a screwdriver, small pliers and an adjustable nut. The main negative is its fragility. From the first release, fixing the vertical bar for holding / guide the tricycle broke. More generally, we feel that all this is not very solid. This is often the case with Disney products (textiles, toys ...): the brand appeals to children but the quality is poor. Anyway, my daughter loves her tricycle is essential.