Good timing of your post. I saw them this weekend and just spent a bunch of time & effort going to multiple Costcos to bring 6 of these bad boys home. I really do like them. They are contemporary'ish (vs the fluffy pillowy stuff), they have nice tray tables (silver and black), and a USB and power port in the armrests and glide nicely. I like them a lot, but unfortunately they are going back. As mentioned earlier, they are big, especially as they are individual chairs and thus have extra armrests (vs row of 3 which shares). In my 12'4" wide room, they technically fit but leave very little room on the sides. Yes I measured and know they technically fit, but its too tight overall.
To your original question, I like them, alot. Are they well made? As a first time buyer of these chairs, I have no clue if underneath they are made well. What is foam density? Who knows?.....there are no specs and you cant' contact the company.
At 3K for 6 chairs, that's the same price as 3 chairs from Palliser or something. But sadly they are going back.