Very much personal taste, rossim. I like crosswords where you solve the clue then enter it in the grid. I avoid the ones where solving the clue is only the first step - letters to be removed, misprints etc. (the closest I get to these "second level" puzzles are alphabetical jigsaws).
I appreciate that lots of people do enjoy the extra challenges, as evidenced by the well populated threads on the Listener and similar crosswords.
Nevertheless I can admire Les's tour de force in setting this puzzle.