I have one of the old Jackass rigs, (now Galco Miami Classic). I bought it new about 35 years ago. When I bought it I was carrying a S&W 645 with two magazines and handcuffs. When Glocks came out I switched to a Gen-1 17. All I had to do was change the holster and the mag carrier.
The good.
Made from quality leather, comfortable, adjustable, lots of options and accessories. Everything you need is in one rig. No separate action like putting each item on a belt and adjusting each time. Less chance of printing.
The bad.
Expensive. It was almost $200.00 back then.
Once you put it on, you can’t take it off without someone seeing it unless you’re in private. In today’s society there are places you can’t carry and a lot of holsters are designed to clip on and off of a belt.
The cross draw action must be practiced. One hazard is sweeping someone while drawing. My department allowed their use, but when it came time to qualify they were not allowed on the range. Another is if you’re close to a subject and they see you reaching to draw, they could push you against a wall and trap your arm and prevent you from drawing.
Even more expensive now.
When someone asks you who made your holster and you say Jackass, they think you’re calling them names. When I found out the name had been changed to Galco I asked the store I bought it from why they changed their name. He said that the company rep said that they couldn’t keep a secretary who would pick up the phone and answer every call with “Jackass”.