Combi: Toilet Training Seat

I bought Combi: Toilet Training Seat two weeks ago from SOGO. It look cute and sturdy. The most important is Megan like to seat on it.
The seat is suppose for 18 months toddler and below 30 kg. But because Megan already able to sit straight and without assistance, I thought, why not give a try?
To introduce the seat to her, I put her on it when she just wake up dry from a nap and asked her to shi-shi by making shiiii-shiiii... sound and she peed in the toilet. Since then, in these past two weeks, almost every time she want to shi-shi, she'll tell by making 'nng' sound and tapping her diaper. Glad it's useful.