No effect, but I passed through my Virtualizer Pro is the most irrelevant.
Already without the effect is not bad.

UTILIZATION

Using ultra simple. In two minutes you can make very good pattern that sound still good.
The issue is simple. No menu or submenu. Direct access.
Truly the top.

SOUNDS

Very very good sounds
I had a DR-66o there five years, with regret that I sold.
I bought a year ago, in a speed DR-3. I sold one month later (no, really bad).
I bought a DR-550 mkII in okaz for 75 euro. I really found the punch 660 and with more ease programming incredible but true.
This stuff is really cool, portable and small.
I will never sell it.

OVERALL OPINION

See sounds.