I have a Marlin 60 and a Glenfield 60 (same gun). They are awesome guns and very, very rarely have a malfunction. Super easy to take apart for cleaning and a superbly accurate.
I have to warn you though, ever since Remington bought Marlin, the quality of these has went downhill a bit. If he gets one, check it over a little before buying. Make sure the crown isn't buggered up and things like that. When you get it home it might need a little smoothing out to get it running good, at least that's what I'm hearing about them.