We have had them in Australia for a couple of years now. The impressive thing is using the conturo with the vacuum clamp because the clamp can rotate and the conturo actually propels the piece. Great for round table tops. When I have used them they even suck onto particle board.
Would I buy one? Probably not because I don't have a use for it. If I was making multiple table tops square or round then yes. They have an amazing grip! Even the compressor is in a dedicated systainer. http://www.festool.com.au/epages/tooltechnic.sf/en_AU/?ObjectID=358458
Be prepared. Ducting is expensive and the costs goes up considerably the larger diameter you go. Even pvc will be expensive. For example a 20ft long 8" pipe will cost over $100. Until you're ready I'd get a portable system and a good respirator.
I have several of those architects adjustable lamps around the shop so we can adjust them for raking light during sanding and finishing. LED spotlight bulbs give me bright light without the heat and they have lasted much longer than the fluorescent curly tube bulbs . Only drawback is the weight (due to the heat sink ) , I had to replace several of the springs with stronger ones. My local hardware store had a pretty good selection.
I've now made a few boards and they're always well received. The mtmwood guy has some nice videos on chaotic boards, https://www.youtube.com/user/mtmwood. Also check out his CNC made inlaid boards - although not wood working in the traditional sense, I find it mesmerizing to see the process.