I'm not saying one way or another - just passing some info.
some articles from StuartW
http://www.theage.com.au/business/when-buying-off-the-plan-turns-out-to-have-an-unplanned-downside-20100207-nktw.html
http://www.prosolution.com.au/news/past-newsletters/nov08.pdf
OTPs can be a PITA at...