These models are of the quality you'd expect from GW. The good news for these is that they are push fit, and pre-coloured plastic so you can play very quickly.
I found minimal mold lines on the models which made construction even faster.
I liked the cards and there's enough variety to build a lot of different decks, there will be room to experiment and build a deck around your playstyle.
Finally, these models will integrate well into your Undead army :)