I have this laptop, my favorite ever, though mine has an i7-10610U processor. It's just a solid, sturdy machine with consistent, straightforward performance. No glitches.
The review criticizes the speed of laptop's SSD. That's okay, but to me it's more important that the SSD run cool than at the fastest imaginable speed. My SSD runs cool. In my opinion, it's better than the Samsung.
My laptop differs from the review model in that mine has the optional aluminum palmrest and lid. Recommended.
I know little about Lenovo but have owned two HP Elitebooks. The Elitebooks were good machines but Dell's product is better overall than HP's. In the Latitude lineup, Dell does not inflict extra, ill-designed features on the user as HP sometimes does. Dell does the basics well.
The review notes a screen flicker. Maybe someone has eyes that can detect such a flicker, but mine cannot. The screen is the easiest on the eyes for long periods of any screen I have owned.
Dell's phone support is provided by competent, well-trained, kind, relaxed agents.
The Dell Latitude 5510 is an excellent laptop in my opinion.