My wife bought me a Core Series LX PLus chair as a birthday present. I wanted a good chair and this one ticked all the boxes, 330 Lbs max weight (I'm 190), metal armature and base, good reviews... We got the chair via Amazon and I was instantly pleased with it, it was sturdy and comfy, the only thing we noticed was the base was not metal but made of some kind of plastic (while their website states it comes with a metal base). Long story short after 23 days of use, the base broke, rendering the chair unusable as it cannot hold all the wheels. I contacted AK Racing support since this comes with a 5/10 years warranty. It took them 5 days to reply to me, stating the claim was opened and accepted but the part was on backorder and I will have to wait an undetermined amount of time before the part can be shipped. I replied and asked if I could have an ETA on when I would receive the new base and if by any chance I could get a metal one as advertised for this chair model. It has now been another 7 days and no one from AK Racing dared to reply to me yet. I'm now considering buying a 3rd party metal base so I can use this chair again. I'm really disappointed that a chair with a $400+ price tag is so poorly built and that the AK Racing customer service is ridiculously bad, if not non-existent! Also, stating the base is metal when it's clearly plastic is totally misleading! Sadly, I cannot send it back and get my money back since it's past the 30 days return period with Amazon! Not worth the money! They lied on the product build and their customer service is a total joke! Disappointed is an understatement!