I loved my Hammer Demo Day experience. Back when I went they had the Vicious, Vicious Pearl, Vicious Particle, Diesel, Diesel Particle Pearl, Diesel Reactive, Blade, Blade Pearl, and Blade Particle. The shot was your typical house wall but I noticed some of the stuff just seemed to finish so much harder and give me a I was using a Colossus Pearl, Quantum Raven, El Nino 2000, and a Mike AUlby MVP at that time. The Blade Particle, Diesel Particle Pearl and Blade Pearl were my favorites. I didn't care for any of the Vicious balls or the Blade Solid. Mike Machuga was there and he really made it a good experience with helping people out on the lanes and offering advice on surface adjustments to tune reactions of the balls and offering drilling recommendations.
BTW, how did you like the Shooter XL? I just bought one and I love it. Excellent lighter condition ball but most people will look past it since everyone wants the biggest hooking ball availible to impress their fellow house bowlers. That's the main problem I see with people. Everyone wants to buy a ball, they don't want to buy a reaction.