I created this simple benchmark to determine, weather my bed leveling is any good on my Creality CR10S. If your bed leveling, temperatures, axis calibration is good, you should get result even better than me on the photos. No overhangs, nice and smooth sides, constant angle at roof and nicely readable letter B at 60 mm/s printing speed.
If your print looks worse than my, try to adjust bed and temperatures. It works 80% of the time. Also, wet filament can cause inconsistent printing lines.
Do not use any support or rafts. Well set 3D printer must print the benchmark without any issues.
It takes only about 60 minutes to print. Enjoy...

If you like this model, feel free to live a donation, so I can make more models. Every dollar helps. Thanks :)