Where can I convert HNT to ETH?

I'm curious to know, where can I effectively convert my Helium Network Tokens, commonly known as HNT, to Ethereum, or ETH for short? As a crypto enthusiast, I'm always looking for reliable platforms or exchanges that offer competitive rates and smooth transactions. Could you recommend a few platforms that cater to this particular conversion? I'd like to ensure that the process is secure, transparent, and efficient. Additionally, I'd appreciate any insights into potential fees or transaction times associated with such a conversion.