I bought four of these chairs for our bar.  I needed something sturdy and sort of minimal to suit us and our decor.  

These chairs came expertly packed, were easy to assemble.  As others have said, there were no assembly instructions. But if you need them, you should probably get someone else to put these together because no instructions were necessary. Simple four bolt installation for the swivel base and then screw the seat on.  Easy.  I put all four together by myself in less than 30 minutes. 

They are very sturdy. My 6'5' 250lb man sat on them and declared them sturdy and comfortable!  While the seats are vinyl, they can easily be recovered in the fabric of your choice. And you can't beat the price.  I caught them on sale and got 4 for less than $175!!