I bought these online 4 weeks ago... my 13 yr old put them together and I tightened all the screws. Unfortunately, the seats themselves are not wide or supportive enough to comfortable sit anyone over 100lbs. I'm 5'10" and weigh 155lbs... my rear and thighs are well over the sides of the seat. The seats are not adjustable so it feels like you're always sliding out of it. My 6 yr old is the only person who can comfortably sit on these.