Just got a 5490, other than occasional coil whine during heavy work load, everything else is fine.
It's surprisingly small and feels like a 13' laptop due to the small bezel. It has all of the ports needed these days and a type-C port that can also charge the device. Integrated Windows Hello fingerprint sensor on power button is a bonus. Keyboard feels nice with no flex at all. Precision trackpad is not glass, but reasonably smooth. The matte 14' IPS screen is bright and shown as HDR compatible for some reason (Didn't test that, maybe some Dell software trickery). The quad-core Comet Lake i5 is overkill for daily tasks and often maintains 2.7 Ghz boost under heavy computation. Lasts about 8 hours taking notes and programming in Python. Fans is super quiet and only kicks in when it's slightly warm to touch.
The included BC501 NVMe SSD (a weird 2230 PCIe x2 card) and 9462AC WiFi card are garbage, but upgradable (especially need a lot of work to swap SSD because of the strange 2230 mount). The memory is 4 GB soldered plus a 4 GB Kingston stick, compatibility seems tricky 'cause system doesn't report SPD and memory timing for some reason. My HyperX 2666 C15 16 GB SO-DIMM doesn't work for some reason. I suspect that
BIOS applied a memory wrong profile, or my memory was too aggressive (The original seems to be a C19 module). Also it came with a ton of Dell
bloatware "features" that is not quite helpful.
Overall, it's a great budget machine for daily school/work routine.
I think there's a Ice Lake variant of this series of laptop (5493), I suggest you to get that one (if possible) for better iGPU performance, full size SD and Ethernet, albeit slightly larger.