Neoflex was one of Hammer's best coverstocks. This Reaper was designed to be a controllable ball on medium-dry and broken down shots. I've never thrown one, but I don't think they made a bad Neoflex ball (3-D Offset Violet, Spike, Nail Pearl, etc.)
Info I grabbed from the old Faball site before it went down:
Multi Color Reactive Neoflex XL
PERFORMANCE EVALUATION:
The higher R.G., lower differential REAPER XL core aids the REAPER in creating eXceptional Length through the front part of the lane. The highly polished Reactive Neoflex XL coverstock also assists in conserving rotational energy thereby delaying the balls transition from skid to roll. This leaves plenty of energy for backend finish where it is most needed on medium to dry lane conditions.
HOOK POTENTIAL: 17
BACK END: 18
LENGTH: 16
RADIUS OF GYRATION: 2.55 (MEDIUM/HIGH)
DIFFERENTIAL: .039 (MEDIUM/LOW)
FLARE POTENTIAL: 2" - 5"