Share 'Notubes Alpha 340 Wheels'

Anyone have any experience with these wheels yet? - http://www.notubes.com/product_info.php/cPath/42_683/products_id/520 The 18 spoke count for the front has me a little concerned. It might be better to buy 2 of the 24 hole rims and build them up. We are on the fence between getting these or going tubular.  Any thoughts?