Lenovo‘s website was very frustrating when trying to buy a T480s; weird navigation and a configuration wizard that crashed sometimes. Mostly, though, they give you a model ID and if you put it in the “Model ID” search box, it yields nothing and additionally empties the shopping basket, so that you have to start over.
I eventually bought it from a local store, but if I didn’t know that I wanted a Lenovo, I would have given up and bought something else.