I haven't, but I am seriously considering investing in one. I'm also wondering how well it works. It's a good chunk of money, but if it works well it would save me a lot of time!
I live one click from their show room. They offered to give me a demo, but I'm such small potatos, I couldn't begin to use one. I would say they are a reputable company, and if you needed one, buy it from them. Maybe they have some streaming video of the arch they can email you.