I get the impression from reading the posts above that many think NW often offers the least in terms of compensation for a voluntary bump. My experiences have been great with NW. I have always received a voucher for a free ticket rather than a dollar amount, and NW doesn't even seem to hesitate to offer the vouchers. I paid $305 for a coach ticket (LSE-MSP-MEM-MCO) a couple of weeks ago. In LSE, volunteered to be bumped and pocketed a free ticket, upgrade to F/C, and a direct MSP-MCO flight which arrived an hour earlier than expected. On the return, pocketed a free ticket in MCO for a bump to a flight leaving 20 minutes later and another free ticket when I volunteered to be bumped on the MSP-LSE leg. Bottom line is I flew only 4 segments and pocketed 3 free tickets. Gotta love NW for this if nothing else!