Hi Brian,
I have used them before on RC cars with no problems.
Some times when I am deciding on something I list the pros and cons and see what wins. For me I can't think of any pros to using the steel whip antenna. There are several cons. Here is my list, maybe your list is different.
You have to commit to it by cutting your antenna that makes it hard to use the Rx in other models.
You have extra connections that can fail.
They are an added expense.
If you have any radio glitches it's another thing you have to consider.
-Mike