they should have no problem, the only time personally i think when head gaskets suck to install is on v6's and v8's because they're harder to get to, on the civic's, accord's, integra's, etc.. it's simple just make sure when they go to put everything back together, especially the head and valve cover that they don't overtighten the bolts, me and my ricer buddies have snapped quite a few valve cover bolts because they seem to be so brittle. but as far as your question goes, don't worry about them messing up, if they really do know basic mechanic skills. if not, then stay away.