there are 2 companies that make ROOR, the american and the original german company. ROOR germany stopped shipping to america and canada because american ROOR is 100% ripping them off. so chances are you're piece isn't a true ROOR. The american ROOR does smoke quite good though.
I've tried them all.. In my opinion I love RAW they don't have any additives and they have this criss cross watermark that makes them not run. They burn askew a hell and don't change the taste of the bud.