Rating for ease of assembly is given because my maintenance guy was able to put the chairs together without reading the directions, after he looked at what was there to assemble. They look VERY nice. They are a bit heavy, but I need them to be heavy-duty for some of my clients, so that's an acceptable trade off to me. They are COMFORTABLE. Not squishy comfort, but sturdy, back-supporting comfort. They are very modern looking, and great quality. I like that I will be able to disinfect the material if needed. It is either leather, or a very good-quality leather-look-alike. I have received several compliments on how nice they are and I've only had them in place for 2 weeks!Update: These chairs are awesome. But Heavy. I purchased several types of 'sliders' to help them move across the carpet in my office, but nothing worked very well at all. My last purchase was for a screw-in slider, and when I pulled the little rubber feet out of the chairs, to my pleasant surprise, I didn't have to use the sliders at all, the chair moves easily without the rubber (tiny) 'feet'! (I did have to grind down a teeny bit, 2 of the 8 holes the feet came out of, but that was easy :-) ) Wanted to pass this info along in case someone else was having difficulty with the movement of the chair on carpet.