AdvantagesCompact, portable, very powerful, excellent quality of features and sound, simpler than 540.
DisadvantagesNo longer made, replaced by E300 and 400 series now.
AdvantagesA tremendous instrument for the musically minded
AdvantagesCompact-ish, light to carry, a few great features, good touch sensitivity, versatile.
DisadvantagesTinny external sound quality, not many new styles offered, some surprising omissions, build, price