We did the 3 day method for both of our kids. We created a zone in the kitchen and spent a weekend supervising. They got it eventually.

We think it's effective, but you have to be dedicated.

Our daycare did a lot of potty training for us by getting him to start peeing after lunch on the potty. He was peeing on the potty at daycare no problem, but not at home, for the longest time.

Eventually we bought those toilet training underwears. They worked really well. Never had to do the 3 day thing.

He now has no problem with peeing and holding it. He hasn't had an accident yet, fingers crossed.

Poo on the other hand, that's been really hard. He's poo'd his pants so many times i can't count lol. But finally we think we turned a corner, the last 2 times he's told him mom he needs to poo and then runs to the potty. He starts preschool in Sept and he needs to have this nailed down by then. The pressure is on.

I should clarify that even though we had "potty trained" our kid, for another few weeks -- could have been as many as an extra few months -- we were actually still putting our kid to sleep while having him on a diaper.

Right after what we thought was successful potty training, we had mistakenly assumed that it would be OK for our kid to just sleep in his regular undies. I don't exactly remember what happened specifically, but over those next few days (or maybe a week or two), there were still 2 or 3 evenings when he had accidentally peed during his sleep. After the few overnight accidents, we figured we didn't want to take the risks of keep having to watch a wetted bedsheets + pee-proof liner, so only when our kid was going to bed for the night, we would put him back into a diaper. Over time, there were still some overnight accidents, but eventually that happened less and less, and he started complaining that the diaper was not comfortable, so we stopped using the overnight diaper.

And just to be clear, during this time when our kid was still sleeping overnight with a diaper, he is as potty trained as a kid can be during the day. There were still accidents here and there, but overall, it was not a concern during the hours when he was awake.