The only drawbacks to the PA80 are the drum fills and the vocal harmonizer. The actual tone of the harmonies is good, but the control is way out in left field. There is NO way to trigger harmonies except in VOCODER type mode. Actual notes played translate to actual harmony voices sounded. Very wrong to only include that method.
The drum fill are horrid. Many sound like a new drummer stepped in to play the fills and let another player handle the rest of the trax. Again...great tone and kits, but lousy control.
The PSR drum patters are more usable ina generic sense.

The strengths of the PA80 are:
1)dual sequencers
2)multitasking with ease
3)good feel
4)better than average piano sample
5)stereo inputs to the SPEAKERS.
6)SPEAKERS
7)multiple outs
8)deep editing of sounds and styles
9)rewritable styles...even factory styles.
10)light weight, yet pretty loud and powerful.