I loved it!
And I will definitely do it again.
See this basket?
I just put it together for a fundraiser at school, after collecting money from other parents and purchasing the Lego sets at Target. The giant box at the back of the basket is the Lego Star Wars Sith Fury-class Interceptor, which had a shelf price of $89.99. I was standing in the store, talking to a mom I'd run into, when it suddenly occurred to that it might be cheaper at Amazon and that I could price match if it was. And it was! When I looked it up on Amazon on my smartphone, it came up $71.36.
Naturally, I headed over to Guest Services, and asked them to match Amazon's price. They have to look up the item on the Target-owned iPad to verify the price, and I was told that for Amazon, the item has to be "sold and shipped by Amazon." (Luckily for me, the Lego set was sold and shipped by Amazon at the time, because it's over $130 from a third-party seller right now!)
It seems like once the Target team member has verified the other store's price, it's a simple matter to change the price when ringing up the item. My receipt shows the item at the price-matched price, and underneath that, it says "Regular Price $89.99."
You can read Target's full price-matching policy here.
Do you price-match?