We updated ours without issue, but I would highly recommend the following BEFORE starting the upgrade:

1. Back up all your documents and files

2. Delete all unnecessary software, and software that you can reload later.

3. Patch/update the current version of Windows you are upgrading from so that it's current.

4. Update the BIOS and all drivers to the most recent stable version (from Dell)

Then, I would use the Windows Media Creation tool to create a bootable USB installation drive, and load the current drivers for the pre-install version of Windows as a backup.

I would then try the "in place" upgrade, assuming you don't want to change any settings.  However, if I ran into any difficulties with that, I would install from the USB drive using the media created above.