I had an 8x10 PF frame and got rid of it mainly to get an 11x14 frame from another maker. Before I sold it, I replaced 2 of the clips.
The clips, even when they were intact, were a pain, sometimes literally because they snapped shut so quickly. With the PF frame, closing all 6 clips was an inconvenience, especially when working in the dark. With my new frame, I have the 2 springs closed and ready to print in just a couple seconds. I suspected they didn't provide enough pressure in the center of the frame either, but I was never certain of that.
I had no problem with the frame itself, just the clamping mechanism. It seems like if you offered a choice of a better spring for just a little more money, you'd have a better product.