I was a bit dissappointed. The writing got a bit Mills & Boon in parts.
Some of it was very far fetched even for magic. Hermione's little beaded bag, which held everything including the kitchen sink but she hid it in her sock at one point? Yet they have been lugging huge trunks on and off the Hogwarts Express for 7 years! From the other books we learnt that there are witches and wizards all over the world in vast numbers, just look at the turn out for the Quiditch world cup yet they bump into just the person they need or at least remember they saw/met/read about them somewhere.
Yes, I agree there were some loose ends I would have liked tied up - the Dursleys, the condition of Tonks son and who brought him up, did Lily ever know Snape loved her? Did George carry on with the joke shop without his twin?
There's a lot already mentioned above that I agree with too.
When they camped all those months, how did they wash, wash their clothes, get food besides wild mushrooms and never be seen by a living soul?
I'd also have liked to find out how muggle borns got into Hogwarts. Did they pay, were they scholar shipped. Does everyone go to Hogwarts in Britain or just the lucky ones. What happens to unschooled wizards and witches?
No, I'm still waiting for the end even though Voldemort is dead. (Still not sure why Harry isn't if he was a horcrux) I will have to read the near death experience bit with Dumbledore again.