I have a Tr 61. It´s a good synth specially for synth sounds not as good for acoustic instruments. I like the strings, the bells, the drums some guitars and a few pianos. There are not many saxos nor flutes nor trumpets but plenty of synth sounds that are very good. It´s a light and quite well built keyboard with channel aftertouch. If you are used to arrangers it´s very different and difficult to program things having to press many buttons to do it. I would NOT recommend it as a controller keyboard. If you need a controller buy one. You can set up a Program (single sound) or a Combi (up to 8 sounds)or a Sequence (up to 16 sounds)and play internal and or external sounds but you can't make changes easily on the fly in the way we play arrangers. For example if you play a Combi with internal and external sounds you can't turn on or off the external keyboard with one switch. Everything has to be pre programmed. Sorry for my English. Ask me if you have any questions.