I have become a fan of most parts of the "3 day potty training method" now (as a daycare provider)....I have seen it in action for an otherwise completely uninterested, had NEVER gone potty for me, 27 months old at the time little boy.
Basically its potty training boot camp. The first part is sort of ceremonial..for BOTH of you...tossing out every single diaper and pull up, etc you have..from the car, the diaper bag, everywhere, so you do not fall back on them. It requires complete and total dedication for the 3 days (some might take a few days more or you may finish in 2 days).....but plan for the 3 days...have groceries in stock, no errands or visiting or chores or anything planned to leave the house..NOTHING but total dedication to your child so you can literally be 2 feet from them at all times including overnight.
Potty chairs belong in the bathroom...in the real world you can not go potty in someones living room, so why teach them they can? Also, never say "Its OK" to have an accident...figure out other wording that is not blame and shame, but still conveys accidents are not ok..something about how we don't want to have accidents and pee and poop go in the toilet, not our pants...so you are not OK'ing the accident , just explaining what they SHOULD be doing instead of NOT doing. And always say poop is ishy...not in a cutesy way either..but in a matter of fact way. Because it is, and that sort of ishy stuff belongs in the toilet. Its not silly or a funny game that poop is ishy...its poop and it goes in the toilet...plain and simple.
Also, I will never again be the trained person....I never thought I was..but now I see I was a half-and-halfer....I did watch the clock and make a child sit on the potty even if they said no they didn't have to go....I will no longer do that as I refuse to be the trained one! This method encourages and teaches you the approach that puts the control (which is where alot of training problems and regression comes from) into the child's hands..but you as the caregivers have to be hyper-vigilant and observant of their cues and clues and learn them to catch them before they have the accident..instead of making them go on a clockwork time frame, you are always saying (not asking) "remember to tell me when you need to go potty" and similar statements...then THEY learn to tell you....
After seeing first hand the success of this, I am a believer now. I hate pull ups, always have.....and this works but it is HARD....you have to be committed to it..