I totally disagree with pittbull, both single cams and dual cams need tuning and care. Neither is harder or easier when you know what your doing. Dual Cams tend to be slightly faster in most bows, single cams seem to have a purer/dead wall when at full draw. Neither is better than the other unless it comes down to personal preference. I've shot dual cam for years, shot single cams for years, had both at one time or another and don't prefer one over the other...currently shooting a dual cam, love single cams as well...

Like manufacturers, it's personal preference.