I have had some pairs that lasted a long time and some pairs that were not even single use.
I had one pair that the handles fell off the first time I tried using them.

Crash scissors were never meant to be fancy or to last forever but take a good look at them before buying them.
There are some real pieces of crap being sold and there are good solids ones too.
The difference is usually easy to see after you have looked at a few pairs.

I would not likely bother with them as EDC, unless you were a professional.
However if you have a car or house first aid kit they are good additions to it.
(Especially since they are usually less than ten dollars and often available for just over 5 dollars.)