Additional info after 11 months of use:
My initial rating was too high when it came to the sound. In hindsight, I think the pickups are a bit too dull or boring for me. I plan on replacing them with something more exciting and "alive".
The build quality however, is still a solid 5/5 for me, so I still think it's a good guitar.
//End of update
This is my third Harley Benton guitar, and is the one that arrived in the most perfect state. The other two required minor adjustments to the string action or the intonation for some of the strings, but nothing major. This one however, I only had to tune and I was set to go.
No dents or other production faults, no technical issues, no fret issues. There's honestly nothing I have to complain about for this guitar, my copy is for all practical purposes perfect.
It has P90's, so there will be humming when you're not playing. It's unavoidable with this type of pickup unless you do some fancy padding.
The guitar and neck feel light, it's not a heavy guitar, unlike a Tele- or Les Paul-type. The neck is also very smooth. The result is a guitar that feels very comfortable and super-playable.
To conclude. My copy was perfect in terms of build, and it's a very good guitar to play on.