I must say I use my pinball helper all the time. Especially helpful for craigslist pickups, setting up at shows and of course at home. Yes, it is pricey and yes a stool is just as easy (at home at least), but I like to throw some $$$ at folks in the hobby who come up with good ideas/products.
That being said, I do like Pinbee's idea above - appeals to the cheapskate in me.