I know that the Samsung charger is rated for 2 amps, so using any charger less than that will result in a longer charge time. I'm still using an old Blackberry charger in the bedroom, and it charges fine overnight while I'm sleeping. By the time I wake up in the morning, the phone is fully charged. In my home office, I'm still using the HTC charger that came with my old Rezound. The HTC charger seems to charge ok. When I have it plugged in, it seems to recharge at about 20-25 percent per hour.
I did have to replace my car charger though. I had a Griffin 1 amp charger in the car (has two USB ports, but only one was being used). When I plugged the Note II into that, it took forever to charge. Without even using the phone (i.e. no nav, etc.) I could have the phone plugged in for a full hour and the phone would only recharge by about 5 percent. I ended up getting a Verizon car charger that is rated for 2 amps and that charges it fine.