Be aware, any office chairs (JÄRVFJÄLLET, MARKUS) you are buying, you can't return & refund fully if you have assembled the chair once. It’s a design issue and IKEA stating T&C’s doesn’t make it a good case for consumer rights. I have JÄRVFJÄLLET which I'm happy with, using it for a year plus now. And few other products purchased earlier and doesn’t had any reasons to go back for returns or refunds. For a second home office chair, did a online purchase of MARKUS last week due to unavailability of JÄRVFJÄLLET for delivery. Delivery was on time for the MARKUS and once assembled it within few hours felt uncomfortable with my back pain repeated. Hence wanted to return and replace with JÄRVFJÄLLET. Below is my unsuccessful experience & lesson for all, on trying to disassemble and taking the unit to store for return. On these chairs once assembled, you can remove the seat, back rest, handles and wheels from the unit, but you cannot dis-assemble the base unit of the chair. From the store returns team, understand due to safety reasons the base unit gets locked and cannot be removed and put back into the flat case. They can offer 60% of the price of the chair as refunds even though it’s used for only few hours. It's disappointing to note, the products that comes in flat pack can't be disassembled to put back in the flat pack again for returns. You can’t return the product through online returns and can only be done at stores due to this issue. IKEA is pointing out to T&C's clause on why they can't refund the assembled product, even if it is used for few hours after assembling and no disassembling features in the product. My view, they should fix the fault in the designs in the product that stops from dis-assembling the product and send back as returns. Also don’t agree with their view on trying out in store before ordering online. You cannot try for few minutes in store on how good a chair is... unless you use it for a day or two. Those who have back problems like me, would recommend try somewhere else and read their TC's on the returns prior to order.