I was looking forward to trying a new recipe for lasagne like this one. I have to say the produce portion of this dish were expensive for me. I live in Chicago where we have tons of cheap produce markets, however the leeks were $1 each on top of the costs for everything else. Considering you don't use much of the leek, I feel that's wasteful for the cost.
Like others I used my food processor to shred the squash which definitely cut down on some time, so I would absolutely recommend that solution if possible.
All in all the flavors were so-so for me and I don't know if I would spend the time to make this again. I would add a little more nutmeg next time, maybe use a bay leaf in the sauce too, and use fontina cheese instead of parm.