These ReFills add a lot more tools to the already great factory ReFills that make up Reason's factory sound bank. The Abbey Road Keyboards are the best for livening up a track. The Electric Bass patches are by far the most realistic, most dynamic, and most innovative hyper-sampled bass sounds I have ever heard. I always use the Fender Precision and Rickenbacker basses as early on in the track as I can because they're just that good! The Reason Pianos and Reason Drum Kits are also the only option I seem to take for programming realistic sounding live drums, and grand pianos into the mix.