My two are almost accident free, after about 6 weeks. I started with the PLing because DS was intersted in using the potty, and didn't want to wear diapers anymore. I knew DD was physically ready, as she was staying dry through naps and in the morning, and would tell me when she needed to be changed, but wasn't as interested in the potty. They were wearing cloth diapers during the day and sposies at night, so I waited until we were out of disposables and then told them "no more diapers". I bought the regular gerber multi layer underwear, and the gerber plastic covers, along with some WAHM waterproof underpants, and I switched it up often to figure out what would work. DS still wets at night, so I use the gerber cloth and cover, while DD wears the waterproof option (waterproof, not soaking wet proof!).
They both caught on to the pooping quickly (I know, it usually takes longer than the peeing), and neither is upset or disappointed if they pee on the floor....I guess we're still a work in progress. They have two potty chairs, one is in the bathroom and the other in the living room. If they both are needing to go, I take them in the bathroom and one uses the toilet, and the other the potty chair. They're both equally comfortable using both.
When we started, I would have them sit on the potty after waking up, before and after eating, before we left the house and then when we got home, just to get used to the idea. The only real incentive I used was to tell them how happy their daddy would be if they went potty in the chair or toilet...and that was absolutely the truth!! BTW they turned 2 in June.
Nikki, mama to DD and DS1 (6/07) and DS2 (10/10)