Hatsan TactAir 1.6L carbon tank with valve

Does anyone own and use one of these bottles, if so do you like it? They sell this setup at Field Supply for $258 which seems like a really good deal, about $100 less than from Hatsan direct. 98 CI bottle, 2 gauges one for bottle pressure and one for fill pressure, the fill valve 'looks' like it is the same design as the Ninja EZ fill valve. This seems like a real bargain for a 'guppy' size bottle. If anyone has one of these I would also be interested to know if it is DOT certified since most places won't fill it if it is not. Thanks for any first hand info!

Chip