I loved this mug! As a busy mom, it had been so nice to have hot coffee throughout the morning instead of reheating over and over again, and especially on the go. However, I've only had it for less than 8 weeks and now the lid doesn't open. I am really disappointed. I had read that people were having issues with the lid but hoped I wouldn't be one of them. Or maybe that by the time my lid stopped working they would have a new and improved lid. Alas, neither is the case. If it wasn't for the issue with the lid I would have given this 5 stars but not having a functional lid on a travel mug is really limiting and a big issue for me.