I doubt it's gotten better, but 16 yrs ago when I did my wagon, I initially went with a kit. Cost was a big factor, as well as time as my wagon was my driver at the time.
I honestly don't remember which company I bought the kit from, but it was one of the well known suspension companies.
First red flag, kit was to contain "quality name brand parts". I don't read Chinese, so I didn't recognize the 'name brand'.
Second red flag, the parts, particularly the ball joints, were physically lighter. By guesstimation, both new ball joints together weighed the same as one of the original stockers.
I went ahead and proceeded with the kit. About 10K miles of daily driving later, this kit was more wore out than the original components.
The good MOOG could still be had back then, so I pieced together everything I needed and redid the front AGAIN. These parts remain in the car to this day.
Me personally, would never consider a kit again. It may take longer to source individual pieces, but you have more control over wheat you're getting. If you have a show poodle that sees 10 miles a year driving on and off a trailer, then go with a kit, but for a truly driven car, piece meal is better.