Pam, the reason that I mentioned a new tape measure is that from experience the clip on the end of the tape will quite often loosen with time. This results in poor measurements, unless he avoids the clip and measures from the 1" mark out and subtracts the 1" from the total. As for which is the best, you'll get various opinions so all I can say is check them out and remember you'll get what you pay for. You mentioned crown moulding (which I figured was going to be coming next), so here's a good link regarding that project. Click on the button below then goto "Charts and Graphs", then crown moulding.