Super easy to assemble, thankfully because the instructions are on par with a happy meal toys. 2 parts to keep up with instead of losing just one thing. I could wiggle all my toes and my heel had plenty of room (in fact, in thin socks, the heel would slip). Another thing we couldnt do was take phone calls with them. I dont know if this is a quality control issue. The support from these is just slightly better than a pair of flip flops: its sturdy but flexible. No regrets, works well. Arrived on time and in perfect condition. I did my research. They?ve performed well when used to wade rivers and also as a camp shoe.