the new way to extrude with this plugin you can easy make complex modeling with just simple use spline , you can use also to merge spline, with 4 modes to round , chamfer , outline and grow, you can make more complex shapes spline by merge and use this options , also you can use like modeling tool you can easy select a polygon or multi and use after to make more complex extrude just simple on click , the plugin can also use to bevel easy to mirror clone , also you can make and final you can make easy loft , and mix with extrude to make more complex stuff you can easy use spline option to change easy the shape