I bought second-hand dell latitude E5400 laptop and it is my first laptop and I am very impressed by this product.
As it is an old product its battery backup not so good but it is very strong because many times it got dropped by me from my hand because of its weight but always its seems perfect.
Its keys are great, I feel comfortable with this touchpad because I cant use newer models touchpad comfortable, good features. And I most of the times I keep it on 24hrs on the adapter but it doesn’t get harm but it gets warm. I have dual booted and installed Linux kali and ubuntu and it works perfectly. Speed is also quite good.