Chair?

[tROVLET]

hi, i'm not sure if its the right category to ask this question but please move forwad if its not belong here

 

anyways i wanted to ask. what is the diffrence beetween aeron ( 2000$ in my country ) and some other 400$ chairs there are ?

what is so special about this one?

Should i invest so much for a good chair?

 

I do have lower back problems