Is it necessary and helpful for potty training to buy this thing? I need recommendation!

I'm using this in my house! I think it's fairly useful but we had some problems initially. My son kept on wanting to help to pour away the urine after he pees in it. And many times created a whole mess when we tried to 'fight' with him over it. It took some time before he finally stopped doing that and allowing us to dispose of the urine. The suction pads were also not very strong. I had to buy new ones myself.

Yes, I have this urinal for boy and it is very useful for him to pee in standing position. I think it is a step to train boy to use urinal in male public toilet in future. My boy get very interested to pee in this device and in a way it helps in potty training. I got mine from qoo10 for about $8. http://list.qoo10.sg/item/SUPER-SALE-MADE-IN-KOREA-NEW-POTTY/409511096