We also made sure the hull was extra loose - -looser even than the Dominatrix! It's quite amazing really.
Slicyness depends on which one you get. The Booster 50 is very slicy, and even more stable on end than the Dom 47 from most accounts, though it cartwheels faster from end to end so less time is allowed for set-up while cartwheeling, but its easier to link more consistantly, especially with cleans etc. The Booster 60 is not slicy at all for someone my size (150) but it probably is for a 240lbs paddler...
But even while slicy, its still very very adept at river running.