Just bought a Dean Markely Artist pickup for $39 from Music123.com. I bought it to see how well it worked on bass, thinking if it didn't work out I could use in on banjo or perhaps guitar. It's a wooden disk, about the size o a quarter but perhaps 5/8" thick. INside is a piezo element and a lead disk, which turns it into an accelerometer. It attaches with the usual putty you find with many contact pickups. How did it work? Very well. I experimented with various positions on the table above and below the bridge, and found a spot a few inches above the bridge where I got an excellent tone- much better than my Fishman or the K&K I've also used. I used it without a preamp, running direct into my AI amp which has a 10Megohm input impedance. I think I'm going to shorten the cable, making it just ling enough to run to the tailpiece where I'll mount a connector and optionally a preamp. If you're looking for an inexpensive pickup... do check this one out. Dimarzio makes a very similar model that sells for about $10 more.