it's one of those specialty items that you will either really love or really not.
they work very well for some. i gave mine away.
the only way to find whether or not it's useful to you is to actually use it.
unless you know somebody who has one you can try, that will mean gambling the $$$ to buy one.
luckily they are not as expensive now as they used to be.
__________________
- necessity is the mother of invention. lazy is the crazy aunt.
