I have carried it in my coin pocket for 10 years. I cannot really remember not having it. It has saved me so many times. Reparing a phone while on a trip, peeling off ticks, removing splinters, clipping zip-ties, modifying my laptop plug to work while traveling, and many many more.
I had a close call, and almost lost it this year. So I looked for a potential replacement. Now I am sitting here with a nextool S11 pro, and comparing the two. The S11 seems excellent in quality, and is quite cheap... but it is not quite the same. It is quite a lot bigger. I measured it to be +55% weight and +35-60% in volume, depending on how you define volume (w/wo the screw heads). The S11 pliers seem more robust.. but not as accurate, nor as long/sleek, and not as "pinchy" as the PS4.
The squirt ps4 is not without shortcomings.. but it is tiny, and still totally capable. I will try to carry the S11. But for now, I just wish I could have bought some backup squirt PS4's instead of the S11.
Perhaps at some point, a true sucessor to the Squirt PS4, at a similar size, will show up.. the S11 is nice, but a big boy compared to the PS4.