I have used the OUT brand from Walmart/Target.... the ones from Drs Foster Smith, the Four Pads brand and a couple others i can't think of right now.
 
The ones I prefer are the Clean Go Pads from PPE Pet Supplies.  They don't have the cottony stuff in them that go all over the place if they get chewed up..... the pee spot doesn't stay wet like some of them do..... And, they are much more absorbant. 
I also have a diaper genie that I put the dirty ones in so they don't smell up the place in the trash can.  
100 COUNT - Clean Go Pet Puppy Pads - Closeouts