Diki,
There probably wasn't anything "wrong" with the G70 other than it being what it is....
The G70 seems to be regarded as a home keyboard by some, especially the pros, and a pro keyboard only by Roland and a few users like yourself.
Yamaha went through similar issues with the PSR-9000 Pro...gee, if you have to put the name "pro" on it...
A keyboard with auto-accompaniment will always scream "home keyboard" to the pros, and even though Keyboard Magazine features arrangers, the stigma is still strong and alive.
It's tough marketing an instrument like the G70 because it has no on-board speakers(at least the Tyros had them as optional attachments)so it must be a pro piece, yet it has auto-accompaniment so it must be for the amateur or home user.
Quite a dilemma...no wonder it didn't sell well.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.