I've got 20,000+ miles on a solid lifter cam; 15 years of use. no stupid lobes and excessive spring pressure. haven't had the valve covers off in 3 years and probably won't take them off to set lash (lash is a non issue) or peak unless there's a leak or something breaks. it's not a race car but I drive it everywhere in the summer. power is adequate, reliability has been very good. I just use rotella oil, change it fairly often, hate wix filters. if it goes south tomorrow I figure I've gotten my $250 worth.