Its all relative to your personal taste... I made a smoked amber with that cherry smoked malt, 33% of the grain bill. It was nice an smokey, not overwhelming at all... again it all goes back to your personal tastes... if you're not a huge smoked beer fan, I'd say go with 10-20% of your grain bill the first time so you get a feel for it. I used the remainder of the malt in a porter, something around 7% and it was slightly noticable so its not strong stuff at all.