To be honest, Carl, I'm not familiar with them. I've used just about everything else on the market. If you wait and watch, you should be able to pick up a used Pace for about one to two bills. IMHO it's well worth the difference. In fact, if you aren't in a hurry, I have a couple of older Pace units out in one of the trains. Let me look and see what I have. The unit itself isn't so bad, but the vac handles can get pricey. Anyway, let me see what I have that I can part with. Details to follow, flem at ten.