Marius is a genius in my opinion, and many of his plugins should become integrated, standard tools in 3dsmax.  Quad Chamfer is probably one of the top 5 most useful and intelligent plugins available for 3dsmax.  So if you have the money, I highly recommend it.  I think the price is more than fair for what it brings to the table.  There's other plugins out there that can do quad chamfering too (the RappaTools plugin has a version of it integrated), but they don't work as a modifier, and they don't have the optional push feature.  You can use Quad Chamfer on faces, edges, border, and even vertex selections, with options to quad the ends, and intersections, and apply multiple segments.  It's handy anywhere you use chamfer, or extruded/intruded edges previously.

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