I bought this bit set at the end of November 2007 from Revain. I needed the Beats immediately and figured this would be the quickest way to get them. They arrived quickly and were satisfactory in their work. The bits work quietly, with no chatter or play. They cut smooth-bottomed grooves, and plywood is ideal for grooves. My only concern is that I paid too much for it. The shipping price was $42 and the base price was $31. I would take a look if you have time. For example, Grizzly sells them for $14 plus shipping/handling.