With 600 voices and many, many sound efx this is a great buy for the money. However - if you're looking to capture and exact sound, there is very little wiggle room. The voices cannot be altered. What you hear is what you get. Other negatives include short pedal sustain time and difficulty finding and getting to voices on the fly. The latter can be somewhat remedied by setting up parameters and stored in banks and memory numbers (8 banks - 6 memory buttons for a total of 48 user defined presets). It does give you some options like being able to set varying volume levels and attack preferences that you can save into presets. The ability to split (anywhere on the keyboard) and layer sounds work flawlessly. The SP4200 also offers seamless voice changes (a very nice option for playing live). I only wish it had a section on the controls to allow tweaking the voices - but then again - that would most likely rocket the keyboard into a much higher price range.