am finding out information for this too now. anybody can advise?

I have just done my reno and I bought from Hanlim trading in PJ. cheapest price among a few shops i asked. same unit in jalan ipoh shop (one of the many there) is rm600, hanlim rm400. my advice is go for larger unit, more comfortable to sit, and most likely stronger flush

guys,

need to ask something.

during renovation time, when the contractor actually change your WC/install a new WC, do you actually allow them to use it since they need to do their business while renovating your house?

If you don't allow, then what do you do? Where are they gonna do their business? I've been pondering on this ever since my renovation started.

no kidding man. But I don't want them to "open ceremony" my NEW WC before me wor? HOW?! But then again, while they are renovating, surely need to let go once in a while. I can't be getting them a potty right? 

I have 2 bathroom. One has started renovating. The other is pending because according to the workers, they need to use it. So once they are done renovating the first bathroom and moving to the 2nd one, surely they'll have to use the 1st one with the newly installed WC. howwwwwwwwwwwwwwwwww?

Well, you can "open ceremony" first before they can use. Once they install the new 1.