Flimsy but light. Adequate for light use
I am an instructor teaching free lessons to kids in public parks. I have four of these Wilson 75 hoppers, a Gamma 75, and a Gamma 140. I like the Wilson 75's because they are inexpensive and light -- sometimes I have to carry three hoppers full of balls with my left arm while carrying my racket bag on my right shoulder. But they are the flimsiest for sure. Don't buy them for a club, the kids will destroy them. I use them gently and they have lasted 4 years and going strong. The nuts come loose frequently. I went to a DIY store and bought locking nuts, now all is fine. Treat it well and it will reward you.
The Gamma 140 is tiresome. if you fill it up to 140, it's a sturdy load, just ok for short periods of time. If you're a tough machismo, though, this is the hopper for you.