Delivery and customer service is superb. The package were well packed and instruction is easy to followed. The chair itself is made of thin wood (not sure what type of wood). 

So far the four chairs have withstand six months of our normal usage. They all have scratch toward bottom of chairs' legs (probably coming from our iRobot). One of the chair already chipped on one leg. I gave three stars because of (1) screw kept coming loose (which could be from me not assembly tightly) and (2) easily scratches.