He is good and you should hire him. But remember YOU are the project manager and responsible for the results.
I hired Admir and his crew to -
1) install new lights in front
2) install a new video monitoring system
3) removal of a rock in the corner of yard
4) clean out underneath the back steps.
Items 1-3 went very well.
Item 4 I got tired and went inside to relax.
The underneath of the back steps was cleaned out quite well.
Unfortunately, in their eagerness to "go the extra mile" they also dug up the flower bed in front of it, removed the rocks which were lining it, scrape away all the old-growth moss that was lining the walkway to the front, removed the wild flowers along the edge, and cut down a small tree which I had been growing from a seed from the past 10 years.
Again, a really excellent job overall and will totally hire him again.
But next time I will very, very explicit about the scope of work.