I got two sets of these and I like them - they have a very modern look and are pretty comfortable. The base is very light so I probably wouldn’t lean back on the chair. 
Since these came in a package of two, I’ve found that one of the seat is slightly warped because of the other parts that are pressing against it in the box, and this is consistent across both packages that I got. 
My main complaint is that the seats are pretty difficult to lower - I’m a grown adult and have to rock back and forth for the seat to slowly inch down. Can’t beat the price and look though.