Pure Audio Project open baffle speakers

http://www.pureaudioproject.com/

Has anyone out there tried these?

They sound intriguing 

Are there any/many got-ya's like room size, speaker placement in room, amp size/type etc...

A friend tried DIY open baffle a couple of years ago and they were quite large

My problem at the time was the amount of space I had available. I have since moved into a new house with a much larger listening area - 17' x 42' with 8 ft ceiling

Thanks for any input - Cheers