The look of these are great and I think they are comfortable (although I haven't sat for hours at a time) and they were simple to put together. 
Complaints are:
- Wobbly with no way to adjust (although this will be dulled by the below)
- Sound and risk of metal on tile (am going to Macguiver some chair socks - since the legs are so slim, regular protectors are too big)
- Foot rest will inevitably be pushed into my white island panel (so am also going to Macguiver a vinyl tubing to protect)
So, overall decent, but a fair amount of MacGuiver-ing.