We sold and purchased within the last 6 months and the credits didnt influence our decision due to the limits on max home price & income. For some folks I know though, it was addnl incentive to move on that place they wanted.
If it helps responsible folks get into a house they can afford, then so be it. id think it would help move the low/mid price points in the area. I dont want to get into debate here, but overall im not a fan of what i consider to be yet another govt handout
i guess 8k is better than nothing for those who can benefit.