What they got right: What didn't they get right. Everything comes together nicely. The psuedo-science makes sense (for the world of Doctor Who), almost every companion that appears is properly used.
CLICK TO SHOW SPOILER Martha is the best aid (and not just to mislead the audience, although she performs that very well), and perhaps a representation of the TARDIS feeling as underappreciated as Martha's unrequited love for the Doctor. Harry Sulivan, Steven Taylor and Leela protect the Doctor, Mel asks the right questions, Adric helps the Doctor regain control, Sarah Jane...actually she only gets a comic moment, but she's already got her own series and enough New Who cameos, Kamelion actually gets to move around and get past a force field, and Susan's cameo is a very touching moment. Sure, this is continuity porn, but it's continuity porn done right. Tony Lee can't get enough praise for this, but I'd love to see what he can do with them individually with more "screen time". The final battle with all the Doctors gets all but one detail right. And I wish Ben Templesmith had done all the covers. I so prefer his art to Nick Roche's. Yates also continues to be a good pinch-hitter for Pia in the final issue. Shame Pia couldn't make it to the finale, though. (Note how many inkers were needed on this, though.)
What they got wrong: Well, there should be some humbling here. Not much, however. I'm not sure the one companion needed to die again, even if it's not real, although Mr. Lee at least uses the moment. Nyssa is just there to be there. I kind of hoped the Second Doctor would get to see the new control room, so we could get another "I see you've done up the place a bit...I don't like it", and we didn't get another Second and Third Doctor argument, although Third does get to make fun of Fourth's hair again, this time within earshot.
And still no K-9! I was hoping for some K-9 action. Ah, well. Maybe IDW will do a K-9 special sometime and make me happy.
Recommendation: If your any kind of diehard Whovian, BUY THIS BOOK! Either get the trade or hunt down the individual issues, but buy this book!