Bought the Tower 5in1 11ltr air fryer in november.little or no instructions to help navigate the machine. Didn't realise the timer switch was not working, as I was nervous using it at first, until I DID realise the timer knob was not working after some burnt food!! Contacted retailer where I purchased they were unable to offer me a replacement model so gave me a full refund. Tower customer service said they could not offer a discount voucher for me to use and buy another ..... Thought it was the least they could have done, but obviously NOT! Am looking to replace air fryer as I did find it very good even thought the timer did not work.