I bought one and it arrived yesterday. First let me say that it works as advertised. I put a ball in it, set the temp to 135 degrees and left it running while I was bowling league. I got home about 4 hours later and could tell it had done exactly what it should have. For the $189.95 shipped the functionality is without question.
However, I can't see paying any more than the current price for this. It is pretty flimsy and cheaply made(not saying that's all bad, as it does make it affordable to non-commercial users). The bottom of mine was a bear to attach correctly, and once attached, it comes off way to easy. I would not expect to be able to pick the unit up with a ball inside, but I should be able to pick it up empty without the bottom falling off. I was also surprised that it doesn't actually have an on/off switch. Just a knob to set the temperature. Once you plug it in, it is running.
Having voiced my criticism of the shortcoming of the product, I would still pay the $189.95 for it as it works great.