I had a commercial Hi Power back in the 80s, and unlike some here, it was a gun I did eventually sell.
The grip felt great in my hand. Really good.
There were 4 things that I was displeased with. In order;
1) the trigger pull It took "three men and a boy" to pull it enough for the gun to fire.
2) The magazine disconnector. A useless feature (to me) which negatively affects the trigger pull, and keeps empty magazines from falling free. I understand that this feature was added to the design by the Belgian who finished the pistol after JMB's death, at the request of the FRENCH. If true, it explains a lot...
3) The Safety lever. I was never "comfortable" with the safety. While I never had an issue operating it, I always felt that someday, under stress, I might. Small, and rounded, even though it is grooved, the safety just never felt right to me. I much prefer the larger size lever, and particularly the flat "shelf" found on the 1911 pattern guns.
Apparently I'm not the only one, as I see that when Browning Inc. revamped the pistol, (after about 50 years of production) they used a larger, differently shaped safety lever.
4) It was a 9mm Luger caliber.
At the time, I was not a big fan of the 9mm. I'm still not much of a fan of the 9mm, but will admit that its better today than it used to be.
One thing that does irk me is the people who point out the Hi Power's shortcomings (or any other design from that earlier time) in comparison against some pistol who's design is half a century or more newer.
The Hi Power is the last design (most recent) from and era when firearms were not only tools or weapons, but objects d' art, as well. Modern combat Tupperware may be a more efficient weapon, but its not a better gun. The Hi Power has a grace and style, a soul, if you will, that current gun designs are sadly lacking. It may be a Model A Ford compared to the (insert favorite modern car here...), but it still gets you from A to B, and does it with a style you don't see much of, these days.